Prepare release v0.6.0 (#102)

## heroku/python

### Changed

- Updated the default Python version from 3.11.4 to 3.11.5. ([#101](#101))

### Removed

- Removed support for Salesforce Functions. ([#83](#83))

Co-authored-by: edmorley <edmorley@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]
 
+## [0.6.0] - 2023-08-25
+
 ### Changed
 
 - Updated the default Python version from 3.11.4 to 3.11.5. ([#101](https://github.com/heroku/buildpacks-python/pull/101))
@@ -58,7 +60,8 @@ 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/v0.5.0...HEAD
+[unreleased]: https://github.com/heroku/buildpacks-python/compare/v0.6.0...HEAD
+[0.6.0]: https://github.com/heroku/buildpacks-python/compare/v0.5.0...v0.6.0
 [0.5.0]: https://github.com/heroku/buildpacks-python/compare/v0.4.0...v0.5.0
 [0.4.0]: https://github.com/heroku/buildpacks-python/compare/v0.3.0...v0.4.0
 [0.3.0]: https://github.com/heroku/buildpacks-python/compare/v0.2.0...v0.3.0

buildpack.toml

@@ -2,7 +2,7 @@ api = "0.9"
 
 [buildpack]
 id = "heroku/python"
-version = "0.5.0"
+version = "0.6.0"
 name = "Python"
 homepage = "https://github.com/heroku/buildpacks-python"
 description = "Heroku's official Python Cloud Native Buildpack."