Bump gradle-wrapper from 9.8.0 to 9.8.1 - #97

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@v3, actions/setup-java@v3, gradle/gradle-build-action@v2.4.2. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

Failed to restore v7-gradle|Linux|build[37a6259cc0c1dae299a7866489dff0bd]-7a1b88074cb8f8ae9c354d1e40610f0af3f6b6b5: Error: Cache service responded with 400

setup-java v3 is deprecated and will no longer receive updates. Please migrate to actions/setup-java@v5.