chore(ci): bump docker/login-action from 3.6.0 to 4.2.0 - #23

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683, actions/github-script@60a0d83039c74a4aee543508d2ffcb1c3799cdea, actions/setup-java@c5195efecf7bdfc987ee8bae7a71cb8b11521c00, actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02, gradle/actions/setup-gradle@748248ddd2a24f49513d8f472f81c3a07d4d50e1. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/