Swift 5.8 Support

What's Changed

• Replace set-output commands with using $GITHUB_OUTPUT by @417-72KI in #40
• Update docker/build-push-action action to v4 by @renovate in #42
• Set build-arg just before using it by @417-72KI in #43
• Swift 5.8 support by @417-72KI in #45
• Create multi-arch image in local by @417-72KI in #46

Full Changelog: v5.7...v5.8