build(deps): bump actions/setup-java from 5 to 5.6.0 - #150

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

distributionSha256Sum is not set in gradle/wrapper/gradle-wrapper.properties. Please consider adding the checksum, see https://docs.gradle.org/current/userguide/gradle_wrapper.html#configuring_checksum_verification