Use index-digest v1.5.1 by default

What's Changed

• Update ci.yml by @macbre in #12
• Print info with version and commit hash by @macbre in #13
• Pull index-digest image from ghcr.io repository by @macbre in #14
• Use index-digest v1.5.1 by @macbre in #15

Full Changelog: 0.8.0...0.9.0