👷 Changes for plugin developers

• Modernize Jenkins builds (#71) @justusbunsi (credits to @viceice)

📝 Documentation updates

• Update gitea.io to gitea.com (#77) @justusbunsi

👻 Automatic releases are now enabled on merge to master

This comes with a new version number format, see https://www.jenkins.io/jep/229

• Fully enable automated releases (#72) @justusbunsi

📦 Dependency updates

• Bump org.apache.maven.plugins:maven-checkstyle-plugin from 3.1.2 to 3.4.0 (#75) @dependabot
• Bump io.jenkins.tools.bom:bom-2.426.x from 3105.v672692894683 to 3135.v6d6c1f6b_3572 (#74) @dependabot
• Bump com.puppycrawl.tools:checkstyle from 9.0 to 10.17.0 (#73) @dependabot