Log Message:
gh: update to 2.55.0

- Update gh variable get to use repo host
- Unify use of tab indent in non-test source files
- Improve Unix compliance gh repo set-default
- Document that gh run download downloads the latest artifact by default
- Replace --project.* flags' name with title in docs
- Wrap flags with backticks, continued
- Improve gh release create --notes-from-tag behavior with multiline tag
  annotation
- Add pr create --editor
- Require Sigstore Bundle v0.2+ when verifying with gh attestation
- Update Go and other extension workflow templates to reflect recent
  enhancements to cli/gh-extension-precompile
- Add note for external contributors to working-with-us.md
- Update attestation TUF root
- Improve documentation for pr checks and exit codes
- cmd/pr/checks: Describe bucket and state JSON fields
- Add Flox as an installation option
- fix behavior for gh issue develop -b does-not-exist-on-remote
- Update --project <number> flags in gh search to owner/number