docs: Update the README to reflect that this library is GA

README.rst

@@ -1,16 +1,16 @@
 Python Client for BigQuery Connection
 =================================================
 
-|beta| |pypi| |versions|
+|GA| |pypi| |versions|
 
 `BigQuery Connection API`_: Manage BigQuery connections to external data sources.
 
 - `Client Library Documentation`_
 - `Product Documentation`_
 - `Introduction to BigQuery external data sources`_
 
-.. |beta| image:: https://img.shields.io/badge/support-beta-orange.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-bigquery-connection.svg
    :target: https://pypi.org/project/google-cloud-bigquery-connection/
 .. |versions| image:: https://img.shields.io/pypi/pyversions/google-cloud-bigquery-connection.svg

setup.py

@@ -47,7 +47,7 @@
     ),
     python_requires=">=3.6",
     classifiers=[
-        "Development Status :: 4 - Beta",
+        "Development Status :: 5 - Production/Stable",
         "Intended Audience :: Developers",
         "Operating System :: OS Independent",
         "Programming Language :: Python :: 3.6",