Prepare release v310 (#1911)

Co-authored-by: heroku-linguist[bot] <136119646+heroku-linguist[bot]@users.noreply.github.com>

Author: heroku-linguist[bot]

CHANGELOG.md

@@ -2,6 +2,9 @@
 
 ## [Unreleased]
 
+
+## [v310] - 2025-09-23
+
 - Updated Poetry from 2.2.0 to 2.2.1. ([#1907](https://github.com/heroku/heroku-buildpack-python/pull/1907))
 - Updated uv from 0.8.18 to 0.8.20. ([#1910](https://github.com/heroku/heroku-buildpack-python/pull/1910))
 - Fixed errors saving the build cache when installed packages contain broken symlinks. ([#1909](https://github.com/heroku/heroku-buildpack-python/pull/1909))
@@ -1340,7 +1343,8 @@ Default Python is now latest 2.7.10. Updated pip and Distribute.
 - Setuptools updated to v16.0
 - pip updated to v7.0.1
 
-[unreleased]: https://github.com/heroku/heroku-buildpack-python/compare/v309...main
+[unreleased]: https://github.com/heroku/heroku-buildpack-python/compare/v310...main
+[v310]: https://github.com/heroku/heroku-buildpack-python/compare/v309...v310
 [v309]: https://github.com/heroku/heroku-buildpack-python/compare/v308...v309
 [v308]: https://github.com/heroku/heroku-buildpack-python/compare/v307...v308
 [v307]: https://github.com/heroku/heroku-buildpack-python/compare/v306...v307