docs: [run] An existing repeated string field custom_audiences is marked deprecated for WorkerPools API (#7834)

* docs: An existing repeated string field custom_audiences is marked deprecated for WorkerPools API

PiperOrigin-RevId: 886276550

Source-Link: googleapis/googleapis@c063f49

Source-Link: googleapis/googleapis-gen@1adb05f
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packages/google-cloud-run/protos/google/cloud/run/v2/worker_pool.proto

@@ -456,8 +456,8 @@ message WorkerPool {
   bool threat_detection_enabled = 28
       [(google.api.field_behavior) = OUTPUT_ONLY];
 
-  // Not supported, and ignored by Cloud Run.
-  repeated string custom_audiences = 37;
+  // Deprecated: Not supported, and ignored by Cloud Run.
+  repeated string custom_audiences = 37 [deprecated = true];
 
   // Output only. Reserved for future use.
   bool satisfies_pzs = 38 [(google.api.field_behavior) = OUTPUT_ONLY];