Build(deps-dev): Bump parallel_tests from 3.12.0 to 3.12.1 (#18235)

Bumps [parallel_tests](https://github.com/grosser/parallel_tests) from 3.12.0 to 3.12.1.
- [Release notes](https://github.com/grosser/parallel_tests/releases)
- [Changelog](https://github.com/grosser/parallel_tests/blob/master/CHANGELOG.md)
- [Commits](https://github.com/grosser/parallel_tests/compare/v3.12.0...v3.12.1)

---
updated-dependencies:
- dependency-name: parallel_tests
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Gemfile.lock

@@ -324,7 +324,7 @@ GEM
       openssl (> 2.0, < 3.1)
     optimist (3.0.1)
     parallel (1.22.1)
-    parallel_tests (3.12.0)
+    parallel_tests (3.12.1)
       parallel
     parser (3.1.2.1)
       ast (~> 2.4.1)