fix(schema): require hostnames of at least 2 characters - #429

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02, docker/build-push-action@4f58ea79222b3b9dc2c8bbdd6debcef730109a75, docker/metadata-action@318604b99e75e41977312d83839a89be02ca4893. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/