Prepare release v4.1.2 (#507)

## heroku/python

### Changed

- Updated Poetry from 2.3.1 to 2.3.2. ([#501](#501))
- Updated uv from 0.9.26 to 0.9.29. ([#506](#506))

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]
 
+## [4.1.2] - 2026-02-04
+
 ### Changed
 
 - Updated Poetry from 2.3.1 to 2.3.2. ([#501](https://github.com/heroku/buildpacks-python/pull/501))
@@ -570,7 +572,8 @@ 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/v4.1.1...HEAD
+[unreleased]: https://github.com/heroku/buildpacks-python/compare/v4.1.2...HEAD
+[4.1.2]: https://github.com/heroku/buildpacks-python/compare/v4.1.1...v4.1.2
 [4.1.1]: https://github.com/heroku/buildpacks-python/compare/v4.1.0...v4.1.1
 [4.1.0]: https://github.com/heroku/buildpacks-python/compare/v4.0.1...v4.1.0
 [4.0.1]: https://github.com/heroku/buildpacks-python/compare/v4.0.0...v4.0.1

buildpack.toml

@@ -2,7 +2,7 @@ api = "0.10"
 
 [buildpack]
 id = "heroku/python"
-version = "4.1.1"
+version = "4.1.2"
 name = "Heroku Python"
 homepage = "https://github.com/heroku/buildpacks-python"
 description = "Heroku's buildpack for Python applications."