Docs: update Python version support in Python quickstart (apache#39122)

* Update quickstart-py.md

 Docs: update Python version support in quickstart

* Docs: remove 3.9, add 3.14 per reviewer feedback

* Docs: update Python version list based on feedback

* Docs: Fix Python 3.9 and 3.8 end of support version.

Author: jayjayakumar

website/www/site/content/en/get-started/quickstart-py.md

@@ -23,7 +23,7 @@ If you're interested in contributing to the Apache Beam Python codebase, see the
 
 {{< toc >}}
 
-The Python SDK supports Python 3.8, 3.9, 3.10, 3.11 and 3.12. Beam 2.48.0 was the last release with support for Python 3.7.
+The Python SDK supports Python 3.10, 3.11, 3.12, 3.13 and 3.14. Beam 2.69.0 was the last release with support for Python 3.9. Beam 2.60.0 was the last release with support for Python 3.8.
 
 ## Set up your environment