muster release v5.62.8

Fixed

• (deps) Update github.com/mark3labs/mcp-go digest to 2f5b963 in #1827 by @renovate[bot]
• (deps) Update module github.com/giantswarm/selfupdate-cosign to v0.3.28 in #1837 by @renovate[bot]

Full Changelog: https://github.com/giantswarm/muster/compare/v5.62.7...v5.62.8