muster release v5.39.4

Fixed

  • (deps) Selfupdate-cosign v0.3.3, drop x/crypto/openpgp in #1466 by @teemow
  • (deps) Selfupdate-cosign v0.3.4, import the go-selfupdate fork in #1467 by @teemow

Full Changelog: https://github.com/giantswarm/muster/compare/v5.39.3...v5.39.4