build(deps): bump parallel from 1.20.1 to 1.21.0 in /Library/Homebrew

Bumps [parallel](https://github.com/grosser/parallel) from 1.20.1 to 1.21.0.
- [Release notes](https://github.com/grosser/parallel/releases)
- [Commits](https://github.com/grosser/parallel/compare/v1.20.1...v1.21.0)

---
updated-dependencies:
- dependency-name: parallel
  dependency-type: indirect
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Library/Homebrew/Gemfile.lock

@@ -66,7 +66,7 @@ GEM
     nokogiri (1.11.7)
       mini_portile2 (~> 2.5.0)
       racc (~> 1.4)
-    parallel (1.20.1)
+    parallel (1.21.0)
     parallel_tests (3.7.1)
       parallel
     parlour (6.0.1)