feat(notebooks): update the api

#### notebooks:v1

The following keys were added:
- schemas.IsInstanceUpgradeableResponse.properties.upgradeImage (Total Keys: 1)

Author: yoshi-automation

docs/dyn/notebooks_v1.projects.locations.instances.html

@@ -490,6 +490,7 @@ <h3>Method Details</h3>
   An object of the form:
 
     { # Response for checking if a notebook instance is upgradeable.
+  &quot;upgradeImage&quot;: &quot;A String&quot;, # The new image self link this instance will be upgraded to if calling the upgrade endpoint. This field will only be populated if field upgradeable is true.
   &quot;upgradeInfo&quot;: &quot;A String&quot;, # Additional information about upgrade.
   &quot;upgradeVersion&quot;: &quot;A String&quot;, # The version this instance will be upgraded to if calling the upgrade endpoint. This field will only be populated if field upgradeable is true.
   &quot;upgradeable&quot;: True or False, # If an instance is upgradeable.

googleapiclient/discovery_cache/documents/notebooks.v1.json

@@ -1262,7 +1262,7 @@
             }
         }
     },
-    "revision": "20210219",
+    "revision": "20210305",
     "rootUrl": "https://notebooks.googleapis.com/",
     "schemas": {
         "AcceleratorConfig": {
@@ -1885,6 +1885,10 @@
             "description": "Response for checking if a notebook instance is upgradeable.",
             "id": "IsInstanceUpgradeableResponse",
             "properties": {
+                "upgradeImage": {
+                    "description": "The new image self link this instance will be upgraded to if calling the upgrade endpoint. This field will only be populated if field upgradeable is true.",
+                    "type": "string"
+                },
                 "upgradeInfo": {
                     "description": "Additional information about upgrade.",
                     "type": "string"