Prepare release v252 (#1598)

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

CHANGELOG.md

@@ -2,6 +2,9 @@
 
 ## [Unreleased]
 
+
+## [v252] - 2024-06-17
+
 - Removed export of `Pipfile.lock` to `requirements.txt` during the build. ([#1593](https://github.com/heroku/heroku-buildpack-python/pull/1593))
 - Removed internal `pipenv-to-pip` script that was unintentionally exposed onto `PATH`. ([#1593](https://github.com/heroku/heroku-buildpack-python/pull/1593))
 - Stopped exposing the internal `BIN_DIR`, `BPLOG_PREFIX`, `EXPORT_PATH` and `PROFILE_PATH` environment variables to `bin/{pre,post}_compile` and other subprocesses. ([#1595](https://github.com/heroku/heroku-buildpack-python/pull/1595) and [#1597](https://github.com/heroku/heroku-buildpack-python/pull/1597))
@@ -1008,7 +1011,8 @@ 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/v251...main
+[unreleased]: https://github.com/heroku/heroku-buildpack-python/compare/v252...main
+[v252]: https://github.com/heroku/heroku-buildpack-python/compare/v251...v252
 [v251]: https://github.com/heroku/heroku-buildpack-python/compare/v250...v251
 [v250]: https://github.com/heroku/heroku-buildpack-python/compare/v249...v250
 [v249]: https://github.com/heroku/heroku-buildpack-python/compare/v248...v249