Address code comments.

* Update changelog verb.
* Unset env var after test.
* Fix an unnecessary string formatt

Author: issackelly

CHANGELOG.md

@@ -13,6 +13,6 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [2.2.0] - 2025-06-12
 
-### Improved
+### Added
 
 * apppack.toml file is now accessible by APPPACK_TOML environment variable, allowing different services in different environments. 

builder/build/prebuild.go

@@ -155,7 +155,7 @@ func (b *Build) ConvertAppJson() error {
 	}
 	if appJsonExists && !apppackTomlExists {
 		// convert app.json to apppack.toml
-		b.Log().Info().Msg(fmt.Sprintf("Converting %s to %s", "app.json", filename))
+		b.Log().Info().Msg(fmt.Sprintf("Converting app.json to %s", filename))
 		t := b.AppJSON.ToApppackToml()
 		return b.state.WriteTomlToFile(filename, t)
 	}

builder/filesystem/filesystem_test.go

@@ -123,6 +123,7 @@ func TestGetFilename(t *testing.T) {
 
 	// Set the env variable and check again
 	os.Setenv("APPPACK_TOML", "custom.toml")
+	defer os.Unsetenv("APPPACK_TOML") // Clean up after the test
 	filename = GetAppPackTomlFilename()
 	if filename != "custom.toml" {
 		t.Errorf("expected custom.toml, got %s", filename)