chore(homegraph): update the api

#### homegraph:v1

The following keys were added:
- resources.devices.methods.requestLink (Total Keys: 9)
- schemas.RequestLinkRequest (Total Keys: 16)

The following keys were changed:
- revision (Total Keys: 1)

Author: yoshi-automation

docs/dyn/homegraph_v1.devices.html

@@ -83,6 +83,9 @@ <h2>Instance Methods</h2>
 <p class="toc_element">
   <code><a href="#reportStateAndNotification">reportStateAndNotification(body=None, x__xgafv=None)</a></code></p>
 <p class="firstline">Reports device state and optionally sends device notifications. Called by your smart home Action when the state of a third-party device changes or you need to send a notification about the device. See [Implement Report State](https://developers.google.com/assistant/smarthome/develop/report-state) for more information. This method updates the device state according to its declared [traits](https://developers.google.com/assistant/smarthome/concepts/devices-traits). Publishing a new state value outside of these traits will result in an `INVALID_ARGUMENT` error response. The third-party user's identity is passed in via the `agent_user_id` (see ReportStateAndNotificationRequest). This request must be authorized using service account credentials from your Actions console project.</p>
+<p class="toc_element">
+  <code><a href="#requestLink">requestLink(body=None, x__xgafv=None)</a></code></p>
+<p class="firstline">Sends an account linking suggestion to users associated with any potential Cast devices detected by third-party devices. This request must be authorized using service account credentials from your Actions console project.</p>
 <p class="toc_element">
   <code><a href="#requestSync">requestSync(body=None, x__xgafv=None)</a></code></p>
 <p class="firstline">Requests Google to send an `action.devices.SYNC` [intent](https://developers.google.com/assistant/smarthome/reference/intent/sync) to your smart home Action to update device metadata for the given user. The third-party user's identity is passed via the `agent_user_id` (see RequestSyncDevicesRequest). This request must be authorized using service account credentials from your Actions console project.</p>
@@ -177,6 +180,36 @@ <h3>Method Details</h3>
 }</pre>
 </div>
 
+<div class="method">
+    <code class="details" id="requestLink">requestLink(body=None, x__xgafv=None)</code>
+  <pre>Sends an account linking suggestion to users associated with any potential Cast devices detected by third-party devices. This request must be authorized using service account credentials from your Actions console project.
+
+Args:
+  body: object, The request body.
+    The object takes the form of:
+
+{ # Request type for the [`RequestLink`](#google.home.graph.v1.HomeGraphApiService.RequestLink) call.
+  &quot;payload&quot;: { # Payload containing potential devices detected and when they were detected. # Required. ID(s) and detection time of potential Cast devices.
+    &quot;detectionTime&quot;: &quot;A String&quot;, # Required. Time at which devices represented in `potential_cast_device_ids` were detected.
+    &quot;potentialCastDeviceIds&quot;: [ # Required. List of device IDs detected that may potentially be for Cast devices.
+      &quot;A String&quot;,
+    ],
+  },
+  &quot;requestId&quot;: &quot;A String&quot;, # Required. Request ID used for debugging.
+}
+
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
+
+Returns:
+  An object of the form:
+
+    { # A generic empty message that you can re-use to avoid defining duplicated empty messages in your APIs. A typical example is to use it as the request or the response type of an API method. For instance: service Foo { rpc Bar(google.protobuf.Empty) returns (google.protobuf.Empty); } The JSON representation for `Empty` is empty JSON object `{}`.
+}</pre>
+</div>
+
 <div class="method">
     <code class="details" id="requestSync">requestSync(body=None, x__xgafv=None)</code>
   <pre>Requests Google to send an `action.devices.SYNC` [intent](https://developers.google.com/assistant/smarthome/reference/intent/sync) to your smart home Action to update device metadata for the given user. The third-party user&#x27;s identity is passed via the `agent_user_id` (see RequestSyncDevicesRequest). This request must be authorized using service account credentials from your Actions console project.

googleapiclient/discovery_cache/documents/homegraph.v1.json

@@ -177,6 +177,24 @@
                         "https://www.googleapis.com/auth/homegraph"
                     ]
                 },
+                "requestLink": {
+                    "description": "Sends an account linking suggestion to users associated with any potential Cast devices detected by third-party devices. This request must be authorized using service account credentials from your Actions console project.",
+                    "flatPath": "v1/devices:requestLink",
+                    "httpMethod": "POST",
+                    "id": "homegraph.devices.requestLink",
+                    "parameterOrder": [],
+                    "parameters": {},
+                    "path": "v1/devices:requestLink",
+                    "request": {
+                        "$ref": "RequestLinkRequest"
+                    },
+                    "response": {
+                        "$ref": "Empty"
+                    },
+                    "scopes": [
+                        "https://www.googleapis.com/auth/homegraph"
+                    ]
+                },
                 "requestSync": {
                     "description": "Requests Google to send an `action.devices.SYNC` [intent](https://developers.google.com/assistant/smarthome/reference/intent/sync) to your smart home Action to update device metadata for the given user. The third-party user's identity is passed via the `agent_user_id` (see RequestSyncDevicesRequest). This request must be authorized using service account credentials from your Actions console project.",
                     "flatPath": "v1/devices:requestSync",
@@ -216,7 +234,7 @@
             }
         }
     },
-    "revision": "20210122",
+    "revision": "20210226",
     "rootUrl": "https://homegraph.googleapis.com/",
     "schemas": {
         "AgentDeviceId": {
@@ -527,6 +545,40 @@
             },
             "type": "object"
         },
+        "RequestLinkRequest": {
+            "description": "Request type for the [`RequestLink`](#google.home.graph.v1.HomeGraphApiService.RequestLink) call.",
+            "id": "RequestLinkRequest",
+            "properties": {
+                "payload": {
+                    "$ref": "RequestLinkRequestPayload",
+                    "description": "Required. ID(s) and detection time of potential Cast devices."
+                },
+                "requestId": {
+                    "description": "Required. Request ID used for debugging.",
+                    "type": "string"
+                }
+            },
+            "type": "object"
+        },
+        "RequestLinkRequestPayload": {
+            "description": "Payload containing potential devices detected and when they were detected.",
+            "id": "RequestLinkRequestPayload",
+            "properties": {
+                "detectionTime": {
+                    "description": "Required. Time at which devices represented in `potential_cast_device_ids` were detected.",
+                    "format": "google-datetime",
+                    "type": "string"
+                },
+                "potentialCastDeviceIds": {
+                    "description": "Required. List of device IDs detected that may potentially be for Cast devices.",
+                    "items": {
+                        "type": "string"
+                    },
+                    "type": "array"
+                }
+            },
+            "type": "object"
+        },
         "RequestSyncDevicesRequest": {
             "description": "Request type for the [`RequestSyncDevices`](#google.home.graph.v1.HomeGraphApiService.RequestSyncDevices) call.",
             "id": "RequestSyncDevicesRequest",