Re-generate all readmes

Author: Jon Wayne Parrott

speech/snippets/README.rst

@@ -26,7 +26,7 @@ authentication:
 
     .. code-block:: bash
 
-        gcloud beta auth application-default login
+        gcloud auth application-default login
 
 
 #. When running on App Engine or Compute Engine, credentials are already
@@ -127,7 +127,7 @@ To run this sample:
     
     Example usage:
         python transcribe_async.py resources/audio.raw
-        python transcribe_async.py gs://cloud-samples-tests/speech/brooklyn.raw
+        python transcribe_async.py gs://cloud-samples-tests/speech/vr.flac
     
     positional arguments:
       path        File or GCS path for audio file to be recognized