chore(codeowners): fix stale FFE team handle for flags module - #3615

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/setup-java@7a6d8a8234af8eb26422e24e3006232cccaa061b, gradle/actions/setup-gradle@d9c87d481d55275bb5441eef3fe0e46805f9ef70. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

Restore Gradle distribution 9.4.0 failed: Error: Cache service responded with 400