fix(servicenetworking): update the API

#### servicenetworking:v1beta

The following keys were changed:
- schemas.Control.properties.environment.description

#### servicenetworking:v1

The following keys were changed:
- schemas.Control.properties.environment.description

Author: yoshi-automation

discovery/servicenetworking-v1.json

@@ -1034,7 +1034,7 @@
       }
     }
   },
-  "revision": "20250929",
+  "revision": "20251027",
   "rootUrl": "https://servicenetworking.googleapis.com/",
   "schemas": {
     "AddDnsRecordSetMetadata": {
@@ -1932,7 +1932,7 @@
       "id": "Control",
       "properties": {
         "environment": {
-          "description": "The service controller environment to use. If empty, no control plane feature (like quota and billing) will be enabled. The recommended value for most services is servicecontrol.googleapis.com",
+          "description": "The service controller environment to use. If empty, no control plane features (like quota and billing) will be enabled. The recommended value for most services is servicecontrol.googleapis.com.",
           "type": "string"
         },
         "methodPolicies": {

discovery/servicenetworking-v1beta.json

@@ -307,7 +307,7 @@
       }
     }
   },
-  "revision": "20250722",
+  "revision": "20251027",
   "rootUrl": "https://servicenetworking.googleapis.com/",
   "schemas": {
     "AddDnsRecordSetMetadata": {
@@ -1076,7 +1076,7 @@
       "id": "Control",
       "properties": {
         "environment": {
-          "description": "The service controller environment to use. If empty, no control plane feature (like quota and billing) will be enabled. The recommended value for most services is servicecontrol.googleapis.com",
+          "description": "The service controller environment to use. If empty, no control plane features (like quota and billing) will be enabled. The recommended value for most services is servicecontrol.googleapis.com.",
           "type": "string"
         },
         "methodPolicies": {

src/apis/servicenetworking/v1.ts

@@ -786,7 +786,7 @@ export namespace servicenetworking_v1 {
    */
   export interface Schema$Control {
     /**
-     * The service controller environment to use. If empty, no control plane feature (like quota and billing) will be enabled. The recommended value for most services is servicecontrol.googleapis.com
+     * The service controller environment to use. If empty, no control plane features (like quota and billing) will be enabled. The recommended value for most services is servicecontrol.googleapis.com.
      */
     environment?: string | null;
     /**

src/apis/servicenetworking/v1beta.ts

@@ -678,7 +678,7 @@ export namespace servicenetworking_v1beta {
    */
   export interface Schema$Control {
     /**
-     * The service controller environment to use. If empty, no control plane feature (like quota and billing) will be enabled. The recommended value for most services is servicecontrol.googleapis.com
+     * The service controller environment to use. If empty, no control plane features (like quota and billing) will be enabled. The recommended value for most services is servicecontrol.googleapis.com.
      */
     environment?: string | null;
     /**