muster release v5.23.2

Added

• Homebrew: the release pipeline tells the tap giantswarm/homebrew-muster about a release once its binaries are on the GitHub Release (a muster-release repository dispatch from .circleci/custom.yml); the tap’s workflow verifies every binary against its Sigstore bundle before it regenerates the formula. brew install giantswarm/muster/muster follows each release again; the tap had been stuck at v0.7.5 since June.