Alpine Linux 3.19

What's Changed

• Actions: Support Alpine Linux version schema by @sgerrand in #28
• Bump actions/checkout from 3 to 4 by @dependabot in #29
• Bump docker/setup-buildx-action from 2 to 3 by @dependabot in #30
• Bump docker/metadata-action from 4 to 5 by @dependabot in #31
• Bump docker/login-action from 2 to 3 by @dependabot in #33
• Bump docker/build-push-action from 4 to 5 by @dependabot in #32
• Bump alpine from 3.18 to 3.19 by @dependabot in #34

Full Changelog: 3.18...3.19