chore(dialogflow): update the api

Author: yoshi-automation

docs/dyn/dialogflow_v3.projects.locations.agents.flows.html

@@ -1601,7 +1601,7 @@ <h3>Method Details</h3>
 }
 
   languageCode: string, The language of the following fields in `flow`: * `Flow.event_handlers.trigger_fulfillment.messages` * `Flow.event_handlers.trigger_fulfillment.conditional_cases` * `Flow.transition_routes.trigger_fulfillment.messages` * `Flow.transition_routes.trigger_fulfillment.conditional_cases` If not specified, the agent&#x27;s default language is used. [Many languages](https://cloud.google.com/dialogflow/cx/docs/reference/language) are supported. Note: languages must be enabled in the agent before they can be used.
-  updateMask: string, Required. The mask to control which fields get updated. If `update_mask` is not specified, an error will be returned.
+  updateMask: string, The mask to control which fields get updated. If the mask is not present, all fields will be updated.
   x__xgafv: string, V1 error format.
     Allowed values
       1 - v1 error format

docs/dyn/dialogflow_v3beta1.projects.locations.agents.flows.html

@@ -1601,7 +1601,7 @@ <h3>Method Details</h3>
 }
 
   languageCode: string, The language of the following fields in `flow`: * `Flow.event_handlers.trigger_fulfillment.messages` * `Flow.event_handlers.trigger_fulfillment.conditional_cases` * `Flow.transition_routes.trigger_fulfillment.messages` * `Flow.transition_routes.trigger_fulfillment.conditional_cases` If not specified, the agent&#x27;s default language is used. [Many languages](https://cloud.google.com/dialogflow/cx/docs/reference/language) are supported. Note: languages must be enabled in the agent before they can be used.
-  updateMask: string, Required. The mask to control which fields get updated. If `update_mask` is not specified, an error will be returned.
+  updateMask: string, The mask to control which fields get updated. If the mask is not present, all fields will be updated.
   x__xgafv: string, V1 error format.
     Allowed values
       1 - v1 error format

googleapiclient/discovery_cache/documents/dialogflow.v2.json

@@ -6983,7 +6983,7 @@
       }
     }
   },
-  "revision": "20210819",
+  "revision": "20210823",
   "rootUrl": "https://dialogflow.googleapis.com/",
   "schemas": {
     "GoogleCloudDialogflowCxV3AudioInput": {

googleapiclient/discovery_cache/documents/dialogflow.v2beta1.json

@@ -7315,7 +7315,7 @@
       }
     }
   },
-  "revision": "20210819",
+  "revision": "20210823",
   "rootUrl": "https://dialogflow.googleapis.com/",
   "schemas": {
     "GoogleCloudDialogflowCxV3AudioInput": {

googleapiclient/discovery_cache/documents/dialogflow.v3.json

@@ -1621,7 +1621,7 @@
                           "type": "string"
                         },
                         "updateMask": {
-                          "description": "Required. The mask to control which fields get updated. If `update_mask` is not specified, an error will be returned.",
+                          "description": "The mask to control which fields get updated. If the mask is not present, all fields will be updated.",
                           "format": "google-fieldmask",
                           "location": "query",
                           "type": "string"
@@ -3623,7 +3623,7 @@
       }
     }
   },
-  "revision": "20210819",
+  "revision": "20210823",
   "rootUrl": "https://dialogflow.googleapis.com/",
   "schemas": {
     "GoogleCloudDialogflowCxV3AdvancedSettings": {

googleapiclient/discovery_cache/documents/dialogflow.v3beta1.json

@@ -1621,7 +1621,7 @@
                           "type": "string"
                         },
                         "updateMask": {
-                          "description": "Required. The mask to control which fields get updated. If `update_mask` is not specified, an error will be returned.",
+                          "description": "The mask to control which fields get updated. If the mask is not present, all fields will be updated.",
                           "format": "google-fieldmask",
                           "location": "query",
                           "type": "string"
@@ -3623,7 +3623,7 @@
       }
     }
   },
-  "revision": "20210819",
+  "revision": "20210823",
   "rootUrl": "https://dialogflow.googleapis.com/",
   "schemas": {
     "GoogleCloudDialogflowCxV3AudioInput": {