patch(grafana): bump to 13.1.0 - #66

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@v4, docker/build-push-action@v5, docker/metadata-action@9ec57ed1fcdbf14dcef7dfbe97b2010124a938b7. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/