fix(networkconnectivity): update the API

#### networkconnectivity:v1alpha1

The following keys were changed:
- schemas.Binding.properties.role.description

discovery/networkconnectivity-v1alpha1.json

@@ -1116,7 +1116,7 @@
       }
     }
   },
-  "revision": "20240110",
+  "revision": "20240131",
   "rootUrl": "https://networkconnectivity.googleapis.com/",
   "schemas": {
     "AuditConfig": {
@@ -1183,7 +1183,7 @@
           "type": "array"
         },
         "role": {
-          "description": "Role that is assigned to the list of `members`, or principals. For example, `roles/viewer`, `roles/editor`, or `roles/owner`.",
+          "description": "Role that is assigned to the list of `members`, or principals. For example, `roles/viewer`, `roles/editor`, or `roles/owner`. For an overview of the IAM roles and permissions, see the [IAM documentation](https://cloud.google.com/iam/docs/roles-overview). For a list of the available pre-defined roles, see [here](https://cloud.google.com/iam/docs/understanding-roles).",
           "type": "string"
         }
       },

src/apis/networkconnectivity/v1alpha1.ts

@@ -163,7 +163,7 @@ export namespace networkconnectivity_v1alpha1 {
      */
     members?: string[] | null;
     /**
-     * Role that is assigned to the list of `members`, or principals. For example, `roles/viewer`, `roles/editor`, or `roles/owner`.
+     * Role that is assigned to the list of `members`, or principals. For example, `roles/viewer`, `roles/editor`, or `roles/owner`. For an overview of the IAM roles and permissions, see the [IAM documentation](https://cloud.google.com/iam/docs/roles-overview). For a list of the available pre-defined roles, see [here](https://cloud.google.com/iam/docs/understanding-roles).
      */
     role?: string | null;
   }