Java 1.1 language feature tests: local & anonymous classes, initializers, blank finals, class literals - #81

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@v4, actions/setup-java@v4, emibcn/badge-action@808173dd03e2f30c980d03ee49e181626088eee8, gradle/actions/setup-gradle@af1da67850ed9a4cedd57bfd976089dd991e2582. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

Failed to restore gradle-home-v1|Linux-X64|build[04d8ed242d6e4f9366abd4632caf0523]-7db64247bb147a55132c4e5e35b9b6a2f9b31977: Error: Cache service responded with 400

setup-java v4 is deprecated and will no longer receive updates. Please migrate to actions/setup-java@v5.