chore: (speech) update region tag setup in speech/profanityFilter.js (#3971)

Co-authored-by: Jennifer Davis <[email protected]>

Author: hivanalejandro

speech/profanityFilter.js

@@ -15,6 +15,7 @@
 'use strict';
 
 function main(gcsUri) {
+  // [START speech_syncRecognizeWithProfanityFilter]
   // [START syncRecognizeWithProfanityFilter]
   // Filters profanity
 
@@ -54,6 +55,7 @@ function main(gcsUri) {
   }
   syncRecognizeWithProfanityFilter().catch(console.error);
   // [END syncRecognizeWithProfanityFilter]
+  // [END speech_syncRecognizeWithProfanityFilter]
 }
 
 main(...process.argv.slice(2));