fix(migrationcenter): update the API

#### migrationcenter:v1alpha1

The following keys were changed:
- schemas.AddAssetsToGroupRequest.properties.assets.description

#### migrationcenter:v1

The following keys were changed:
- schemas.AddAssetsToGroupRequest.properties.assets.description

Author: yoshi-automation

discovery/migrationcenter-v1.json

@@ -2412,7 +2412,7 @@
       }
     }
   },
-  "revision": "20250928",
+  "revision": "20250930",
   "rootUrl": "https://migrationcenter.googleapis.com/",
   "schemas": {
     "AddAssetsToGroupRequest": {
@@ -2425,7 +2425,7 @@
         },
         "assets": {
           "$ref": "AssetList",
-          "description": "Required. List of assets to be added. The maximum number of assets that can be added in a single request is 1000."
+          "description": "Required. List of assets to be added. The maximum number of assets that can be added in a single request is 2000."
         },
         "requestId": {
           "description": "Optional. An optional request ID to identify requests. Specify a unique request ID so that if you must retry your request, the server will know to ignore the request if it has already been completed. The server will guarantee that for at least 60 minutes after the first request. For example, consider a situation where you make an initial request and the request times out. If you make the request again with the same request ID, the server can check if original operation with the same request ID was received, and if so, will ignore the second request. This prevents clients from accidentally creating duplicate commitments. The request ID must be a valid UUID with the exception that zero UUID is not supported (00000000-0000-0000-0000-000000000000).",

discovery/migrationcenter-v1alpha1.json

@@ -2559,7 +2559,7 @@
       }
     }
   },
-  "revision": "20250928",
+  "revision": "20250930",
   "rootUrl": "https://migrationcenter.googleapis.com/",
   "schemas": {
     "AddAssetsToGroupRequest": {
@@ -2572,7 +2572,7 @@
         },
         "assets": {
           "$ref": "AssetList",
-          "description": "Required. List of assets to be added. The maximum number of assets that can be added in a single request is 1000."
+          "description": "Required. List of assets to be added. The maximum number of assets that can be added in a single request is 2000."
         },
         "requestId": {
           "description": "Optional. An optional request ID to identify requests. Specify a unique request ID so that if you must retry your request, the server will know to ignore the request if it has already been completed. The server will guarantee that for at least 60 minutes after the first request. For example, consider a situation where you make an initial request and the request times out. If you make the request again with the same request ID, the server can check if original operation with the same request ID was received, and if so, will ignore the second request. This prevents clients from accidentally creating duplicate commitments. The request ID must be a valid UUID with the exception that zero UUID is not supported (00000000-0000-0000-0000-000000000000).",

src/apis/migrationcenter/v1.ts

@@ -133,7 +133,7 @@ export namespace migrationcenter_v1 {
      */
     allowExisting?: boolean | null;
     /**
-     * Required. List of assets to be added. The maximum number of assets that can be added in a single request is 1000.
+     * Required. List of assets to be added. The maximum number of assets that can be added in a single request is 2000.
      */
     assets?: Schema$AssetList;
     /**

src/apis/migrationcenter/v1alpha1.ts

@@ -133,7 +133,7 @@ export namespace migrationcenter_v1alpha1 {
      */
     allowExisting?: boolean | null;
     /**
-     * Required. List of assets to be added. The maximum number of assets that can be added in a single request is 1000.
+     * Required. List of assets to be added. The maximum number of assets that can be added in a single request is 2000.
      */
     assets?: Schema$AssetList;
     /**