change log level to debug

lib/tasks/say.js

@@ -34,7 +34,7 @@ class TaskSay extends Task {
     const salt = cs.callSid;
     const credentials = cs.getSpeechCredentials(vendor, 'tts');
 
-    this.logger.info({language,
+    this.logger.debug({language,
       voice,
       localSynthesizer: this.synthesizer,
       speechSynthesisVendor: cs.speechSynthesisVendor,