feat(redis): update the API

#### redis:v1beta1

The following keys were added:
- schemas.GoogleCloudCommonOperationMetadata.properties.apiVersion.readOnly
- schemas.GoogleCloudCommonOperationMetadata.properties.cancelRequested.readOnly
- schemas.GoogleCloudCommonOperationMetadata.properties.createTime.readOnly
- schemas.GoogleCloudCommonOperationMetadata.properties.endTime.readOnly
- schemas.GoogleCloudCommonOperationMetadata.properties.statusDetail.readOnly
- schemas.GoogleCloudCommonOperationMetadata.properties.target.readOnly
- schemas.GoogleCloudCommonOperationMetadata.properties.verb.readOnly

The following keys were changed:
- schemas.GoogleCloudCommonOperationMetadata.properties.apiVersion.description
- schemas.GoogleCloudCommonOperationMetadata.properties.cancelRequested.description
- schemas.GoogleCloudCommonOperationMetadata.properties.createTime.description
- schemas.GoogleCloudCommonOperationMetadata.properties.endTime.description
- schemas.GoogleCloudCommonOperationMetadata.properties.statusDetail.description
- schemas.GoogleCloudCommonOperationMetadata.properties.target.description
- schemas.GoogleCloudCommonOperationMetadata.properties.verb.description
- schemas.Instance.description

discovery/redis-v1beta1.json

@@ -624,7 +624,7 @@
       }
     }
   },
-  "revision": "20210615",
+  "revision": "20210624",
   "rootUrl": "https://redis.googleapis.com/",
   "schemas": {
     "Empty": {
@@ -692,33 +692,40 @@
       "id": "GoogleCloudCommonOperationMetadata",
       "properties": {
         "apiVersion": {
-          "description": "[Output only] API version used to start the operation.",
+          "description": "Output only. API version used to start the operation.",
+          "readOnly": true,
           "type": "string"
         },
         "cancelRequested": {
-          "description": "[Output only] Identifies whether the user has requested cancellation of the operation. Operations that have successfully been cancelled have Operation.error value with a google.rpc.Status.code of 1, corresponding to `Code.CANCELLED`.",
+          "description": "Output only. Identifies whether the user has requested cancellation of the operation. Operations that have successfully been cancelled have Operation.error value with a google.rpc.Status.code of 1, corresponding to `Code.CANCELLED`.",
+          "readOnly": true,
           "type": "boolean"
         },
         "createTime": {
-          "description": "[Output only] The time the operation was created.",
+          "description": "Output only. The time the operation was created.",
           "format": "google-datetime",
+          "readOnly": true,
           "type": "string"
         },
         "endTime": {
-          "description": "[Output only] The time the operation finished running.",
+          "description": "Output only. The time the operation finished running.",
           "format": "google-datetime",
+          "readOnly": true,
           "type": "string"
         },
         "statusDetail": {
-          "description": "[Output only] Human-readable status of the operation, if any.",
+          "description": "Output only. Human-readable status of the operation, if any.",
+          "readOnly": true,
           "type": "string"
         },
         "target": {
-          "description": "[Output only] Server-defined resource path for the target of the operation.",
+          "description": "Output only. Server-defined resource path for the target of the operation.",
+          "readOnly": true,
           "type": "string"
         },
         "verb": {
-          "description": "[Output only] Name of the verb executed by the operation.",
+          "description": "Output only. Name of the verb executed by the operation.",
+          "readOnly": true,
           "type": "string"
         }
       },
@@ -768,7 +775,7 @@
       "type": "object"
     },
     "Instance": {
-      "description": "A Google Cloud Redis instance.",
+      "description": "A Google Cloud Redis instance. next id = 30",
       "id": "Instance",
       "properties": {
         "alternativeLocationId": {

src/apis/redis/v1beta1.ts

@@ -170,31 +170,31 @@ export namespace redis_v1beta1 {
    */
   export interface Schema$GoogleCloudCommonOperationMetadata {
     /**
-     * [Output only] API version used to start the operation.
+     * Output only. API version used to start the operation.
      */
     apiVersion?: string | null;
     /**
-     * [Output only] Identifies whether the user has requested cancellation of the operation. Operations that have successfully been cancelled have Operation.error value with a google.rpc.Status.code of 1, corresponding to `Code.CANCELLED`.
+     * Output only. Identifies whether the user has requested cancellation of the operation. Operations that have successfully been cancelled have Operation.error value with a google.rpc.Status.code of 1, corresponding to `Code.CANCELLED`.
      */
     cancelRequested?: boolean | null;
     /**
-     * [Output only] The time the operation was created.
+     * Output only. The time the operation was created.
      */
     createTime?: string | null;
     /**
-     * [Output only] The time the operation finished running.
+     * Output only. The time the operation finished running.
      */
     endTime?: string | null;
     /**
-     * [Output only] Human-readable status of the operation, if any.
+     * Output only. Human-readable status of the operation, if any.
      */
     statusDetail?: string | null;
     /**
-     * [Output only] Server-defined resource path for the target of the operation.
+     * Output only. Server-defined resource path for the target of the operation.
      */
     target?: string | null;
     /**
-     * [Output only] Name of the verb executed by the operation.
+     * Output only. Name of the verb executed by the operation.
      */
     verb?: string | null;
   }
@@ -232,7 +232,7 @@ export namespace redis_v1beta1 {
     gcsSource?: Schema$GcsSource;
   }
   /**
-   * A Google Cloud Redis instance.
+   * A Google Cloud Redis instance. next id = 30
    */
   export interface Schema$Instance {
     /**