Update packages/google-cloud-storage/README.rst

Author: chalmerlowe

packages/google-cloud-storage/README.rst

@@ -92,7 +92,7 @@ Python >= 3.8
 
 Unsupported Python Versions
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
-Python <= 3.6
+Python <= 3.8
 
 If you are using an `end-of-life`_
 version of Python, we recommend that you update as soon as possible to an actively supported version.