Adding PhraseDetection mode Conversation for ConversationTranscriber

src/common.speech/ConversationTranscriptionServiceRecognizer.ts

@@ -49,6 +49,7 @@ export class ConversationTranscriptionServiceRecognizer extends ServiceRecognize
     protected setSpeakerDiarizationJson(): void {
         if (this.privEnableSpeakerId) {
             const phraseDetection = this.privSpeechContext.getSection("phraseDetection") as PhraseDetection;
+            phraseDetection.mode = "Conversation";
             const speakerDiarization: SpeakerDiarization = {};
             speakerDiarization.mode = "Anonymous";
             speakerDiarization.audioSessionId = this.privDiarizationSessionId;