Changelog entry and fix tests

buildpacks/ruby/CHANGELOG.md

@@ -7,6 +7,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+- buildpacks/ruby: Introduce heroku build metrics support (https://github.com/heroku/buildpacks-ruby/pull/172)
+
 ## [2.0.1] - 2023-07-25
 
 - Commons: Introduce `build_output` module (https://github.com/heroku/buildpacks-ruby/pull/155)
@@ -19,4 +21,4 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Version 2.0.0 for the first release is not a typo. There was an issue in pack where a builder with the same name and version number would reuse artifacts left on image from [prior runs which caused issues](https://github.com/buildpacks/pack/issues/1322#issuecomment-1038241038). There were prior releases of `heroku/ruby` CNB from different sources that triggered this problem. To ensure no one would encounter that issue we developed and released using a version we know has not been used before. Version 2.0 was the first major version without a prior release of `heroku/ruby` CNB from any source.
 
 [unreleased]: https://github.com/heroku/buildpacks-ruby/compare/v2.0.1...HEAD
-[2.0.1]: https://github.com/heroku/buildpacks-ruby/releases/tag/v2.0.1
+[2.0.1]: https://github.com/heroku/buildpacks-ruby/releases/tag/v2.0.1

buildpacks/ruby/tests/integration_test.rs

@@ -119,7 +119,6 @@ fn test_barnes_app() {
         BuildConfig::new("heroku/builder:22", "tests/fixtures/barnes_app")
             .buildpacks(vec![BuildpackReference::Crate]),
         |context| {
-            assert_contains!(context.pack_stdout, "# Heroku StatsD Metrics Agent");
             assert_contains!(context.pack_stdout, "# Heroku Ruby Buildpack");
 
             context.start_container(