chore: update README badges

Author: jackwotherspoon

README.md

@@ -2,7 +2,7 @@
 
 Python samples for [Google Cloud Platform products][cloud].
 
-[![Build Status][py-2.7-shield]][py-2.7-link] [![Build Status][py-3.8-shield]][py-3.8-link] [![Build Status][py-3.9-shield]][py-3.9-link] [![Build Status][py-3.10-shield]][py-3.10-link] [![Build Status][py-3.11-shield]][py-3.11-link]
+[![Build Status][py-2.7-shield]][py-2.7-link] [![Build Status][py-3.9-shield]][py-3.9-link] [![Build Status][py-3.10-shield]][py-3.10-link] [![Build Status][py-3.11-shield]][py-3.11-link] [![Build Status][py-3.12-shield]][py-3.12-link] [![Build Status][py-3.13-shield]][py-3.13-link]
 
 ## Google Cloud Samples
 
@@ -69,11 +69,13 @@ Contributions welcome! See the [Contributing Guide](CONTRIBUTING.md).
 
 [py-2.7-shield]: https://storage.googleapis.com/cloud-devrel-public/python-docs-samples/badges/py-2.7.svg
 [py-2.7-link]: https://storage.googleapis.com/cloud-devrel-public/python-docs-samples/badges/py-2.7.html
-[py-3.8-shield]: https://storage.googleapis.com/cloud-devrel-public/python-docs-samples/badges/py-3.8.svg
-[py-3.8-link]: https://storage.googleapis.com/cloud-devrel-public/python-docs-samples/badges/py-3.8.html
 [py-3.9-shield]: https://storage.googleapis.com/cloud-devrel-public/python-docs-samples/badges/py-3.9.svg
 [py-3.9-link]: https://storage.googleapis.com/cloud-devrel-public/python-docs-samples/badges/py-3.9.html
 [py-3.10-shield]: https://storage.googleapis.com/cloud-devrel-public/python-docs-samples/badges/py-310.svg
 [py-3.10-link]: https://storage.googleapis.com/cloud-devrel-public/python-docs-samples/badges/py-3.10.html
 [py-3.11-shield]: https://storage.googleapis.com/cloud-devrel-public/python-docs-samples/badges/py-311.svg
 [py-3.11-link]: https://storage.googleapis.com/cloud-devrel-public/python-docs-samples/badges/py-3.11.html
+[py-3.12-shield]: https://storage.googleapis.com/cloud-devrel-public/python-docs-samples/badges/py-3.12.svg
+[py-3.12-link]: https://storage.googleapis.com/cloud-devrel-public/python-docs-samples/badges/py-3.12.html
+[py-3.13-shield]: https://storage.googleapis.com/cloud-devrel-public/python-docs-samples/badges/py-3.13.svg
+[py-3.13-link]: https://storage.googleapis.com/cloud-devrel-public/python-docs-samples/badges/py-3.13.html