In a new PR, update the version in pom.xml using

mvn versions:set -DnewVersion=<VERSION>

Commit the changes and open a PR.

On main branch, create a tag for the new version to trigger the release workflow.

git tag -a v<VERSION> -m "Release v<VERSION>"
git push origin v<VERSION>

This will trigger the release workflow which will deploy the release to Maven Central.

Go to https://central.sonatype.com/publishing/deployments to publish the release to Maven Central.

1. Go to https://github.com/prometheus/client_java/releases
2. Click on "Choose a tag", enter the tag name (e.g. v0.1.0), and click "Create a new tag".
3. Click on "Generate release notes" to auto-generate the release notes based on the commits since the last release.
4. Click on "Publish release".