add release instructions

Author: evant

CONTRIBUTING.md

@@ -20,6 +20,19 @@ To debug the compiler, you can write the code you want to test and then run
 ./gradlew :integration-tests:ksp:test --no-daemon -Dorg.gradle.debug=true -Dkotlin.compiler.execution.strategy=in-process
 ```
 Then you can create and run a remote run configuration in intellij to attach the debugger.
+
+## Releasing
+
+In order to publish a release, follow the following steps:
+1. create a branch named: release/<version>
+2. Ensure all changes are listed in CHANGELOG.md
+3. Update the kotlin-inject version in gradle/libs.versions.toml to the release version, removing the SNAPSHOT suffix
+4. Run ./gradlew patchChangelog
+5. Update the version in the README
+6. Create a pull request with those changes
+7. Merge, CI should create a GitHub release and publish to maven central
+8. On the same branch, update the kotlin-inject version again, adding back the SNAPSHOT suffix
+9. Create a second pull request & merge
 
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