Prepare release v2.2.0 (#376)

## heroku/python

### Changed

- The Python 3.13 version alias now resolves to Python 3.13.4. ([#374](#374))
- The Python 3.12 version alias now resolves to Python 3.12.11. ([#374](#374))
- The Python 3.11 version alias now resolves to Python 3.11.13. ([#374](#374))
- The Python 3.10 version alias now resolves to Python 3.10.18. ([#374](#374))
- The Python 3.9 version alias now resolves to Python 3.9.23. ([#374](#374))
- Updated uv from 0.7.6 to 0.7.10. ([#375](#375))

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

Author: heroku-linguist[bot]

CHANGELOG.md

@@ -7,6 +7,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [2.2.0] - 2025-06-03
+
 ### Changed
 
 - The Python 3.13 version alias now resolves to Python 3.13.4. ([#374](https://github.com/heroku/buildpacks-python/pull/374))
@@ -369,7 +371,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Initial implementation. ([#3](https://github.com/heroku/buildpacks-python/pull/3))
 
-[unreleased]: https://github.com/heroku/buildpacks-python/compare/v2.1.0...HEAD
+[unreleased]: https://github.com/heroku/buildpacks-python/compare/v2.2.0...HEAD
+[2.2.0]: https://github.com/heroku/buildpacks-python/compare/v2.1.0...v2.2.0
 [2.1.0]: https://github.com/heroku/buildpacks-python/compare/v2.0.0...v2.1.0
 [2.0.0]: https://github.com/heroku/buildpacks-python/compare/v1.0.0...v2.0.0
 [1.0.0]: https://github.com/heroku/buildpacks-python/compare/v0.26.1...v1.0.0

buildpack.toml

@@ -2,7 +2,7 @@ api = "0.10"
 
 [buildpack]
 id = "heroku/python"
-version = "2.1.0"
+version = "2.2.0"
 name = "Heroku Python"
 homepage = "https://github.com/heroku/buildpacks-python"
 description = "Heroku's buildpack for Python applications."