This repo has GitHub immutable releases enabled, so a release published by hand
(web UI or 'gh release create') is sealed the instant it is created. Since that
same action creates the tag and starts the release workflow, GoReleaser then
finds an already-sealed release and every asset upload fails with
422 'Cannot upload assets to an immutable release' — leaving a release with
notes but no binaries, and no Homebrew/winget publish.

Document the rule in the release checklist: push a vMAJOR.MINOR.PATCH tag and
nothing else; GoReleaser owns release creation. Add the 422 failure mode and its
fix-forward remedy to the troubleshooting section.

Signed-off-by: eunolabs <shekho@gmail.com>
Co-authored-by: eunolabs <shekho@gmail.com>