FAIR-58 CI: Bump the actions group across 1 directory with 4 updates - #18

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@11d5960a326750d5838078e36cf38b85af677262, actions/setup-java@d7793b545071e98d581d3bf084a51c3213318a07, gradle/actions/setup-gradle@48b5f213c81028ace310571dc5ec0fbbca0b2947, gradle/actions/wrapper-validation@48b5f213c81028ace310571dc5ec0fbbca0b2947. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/