Update to show 'google-cloud-speech' is GA. (#8453)

Closes #8452.

Author: tseaver

google-cloud-speech/README.rst

@@ -1,7 +1,7 @@
 Python Client for Cloud Speech API
 ==================================
 
-|beta| |pypi| |versions|
+|GA| |pypi| |versions|
 
 The `Cloud Speech API`_ enables developers to convert audio to text by applying
 powerful neural network models.  The API recognizes over 80 languages and
@@ -10,8 +10,8 @@ variants, to support your global user base.
 - `Client Library Documentation`_
 - `Product Documentation`_
 
-.. |beta| image:: https://img.shields.io/badge/support-beta-silver.svg
-   :target: https://github.com/googleapis/google-cloud-python/blob/master/README.rst#beta-support
+.. |GA| image:: https://img.shields.io/badge/support-GA-gold.svg
+   :target: https://github.com/googleapis/google-cloud-python/blob/master/README.rst#general-availability
 .. |pypi| image:: https://img.shields.io/pypi/v/google-cloud-speech.svg
    :target: https://pypi.org/project/google-cloud-speech/
 .. |versions| image:: https://img.shields.io/pypi/pyversions/google-cloud-speech.svg