fix: fix the field name typo for search service user_labels

Google APIs · copybara-github · commit 11b9e3940fd8 · 2023-05-16T11:31:01.000-07:00
Note: this might be a breaking change for libraries that already released the previous change. Since it's a beta API, we will make it a minor version bump.
PiperOrigin-RevId: 532522130
diff --git a/google/cloud/discoveryengine/v1beta/search_service.proto b/google/cloud/discoveryengine/v1beta/search_service.proto
@@ -458,7 +458,7 @@ message SearchRequest {
   // See [Google Cloud
   // Document](https://cloud.google.com/resource-manager/docs/creating-managing-labels#requirements)
   // for more details.
-  map<string, string> user_label = 22;
+  map<string, string> user_labels = 22;
 }
 
 // Response message for

Original file line number	Diff line number	Diff line change
`@@ -458,7 +458,7 @@ message SearchRequest {`
`458`	`458`	`// See [Google Cloud`
`459`	`459`	`// Document](https://cloud.google.com/resource-manager/docs/creating-managing-labels#requirements)`
`460`	`460`	`// for more details.`
`461`		`- map<string, string> user_label = 22;`
	`461`	`+ map<string, string> user_labels = 22;`
`462`	`462`	`}`
`463`	`463`
`464`	`464`	`// Response message for`