Bump the grpc group with 6 updates - #33

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/cache/restore@v4, actions/cache/save@v4, actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683, actions/setup-dotnet@67a3573c9a986a3f9c594539f4ab511d57bb3ce9, actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02, marocchino/sticky-pull-request-comment@331f8f5b4215f0445d3c07b4967662a32a2d3e31. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/