Prepare release v0.4.2 (#289)

## heroku/go

- Added go1.21.13 (linux-arm64), go1.21.13 (linux-amd64), go1.22.6 (linux-amd64), go1.22.6 (linux-arm64).
- Added go1.23rc2 (linux-arm64), go1.23rc2 (linux-amd64).

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

buildpacks/go/CHANGELOG.md

@@ -7,8 +7,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.4.2] - 2024-08-07
+
 - Added go1.21.13 (linux-arm64), go1.21.13 (linux-amd64), go1.22.6 (linux-amd64), go1.22.6 (linux-arm64).
 - Added go1.23rc2 (linux-arm64), go1.23rc2 (linux-amd64).
+
 ## [0.4.1] - 2024-07-15
 
 - Added go1.21.12 (linux-amd64), go1.21.12 (linux-arm64), go1.22.5 (linux-amd64), go1.22.5 (linux-arm64), go1.23rc1 (linux-arm64), go1.23rc1 (linux-amd64).
@@ -174,7 +177,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Initial implementation using libcnb.rs. ([#1](https://github.com/heroku/buildpacks-go/pull/1))
 
-[unreleased]: https://github.com/heroku/buildpacks-go/compare/v0.4.1...HEAD
+[unreleased]: https://github.com/heroku/buildpacks-go/compare/v0.4.2...HEAD
+[0.4.2]: https://github.com/heroku/buildpacks-go/compare/v0.4.1...v0.4.2
 [0.4.1]: https://github.com/heroku/buildpacks-go/compare/v0.4.0...v0.4.1
 [0.4.0]: https://github.com/heroku/buildpacks-go/compare/v0.3.1...v0.4.0
 [0.3.1]: https://github.com/heroku/buildpacks-go/compare/v0.3.0...v0.3.1

buildpacks/go/buildpack.toml

@@ -2,7 +2,7 @@ api = "0.10"
 
 [buildpack]
 id = "heroku/go"
-version = "0.4.1"
+version = "0.4.2"
 name = "Heroku Go"
 homepage = "https://github.com/heroku/buildpacks-go"
 description = "Heroku's buildpack for Go applications."