Bump rouge from 4.1.3 to 4.2.0 (#538)

Bumps [rouge](https://github.com/rouge-ruby/rouge) from 4.1.3 to 4.2.0.
- [Release notes](https://github.com/rouge-ruby/rouge/releases)
- [Changelog](https://github.com/rouge-ruby/rouge/blob/master/CHANGELOG.md)
- [Commits](rouge-ruby/rouge@v4.1.3...v4.2.0)

---
updated-dependencies:
- dependency-name: rouge
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Gemfile.lock

@@ -109,7 +109,7 @@ GEM
       ffi (~> 1.0)
     rbtree (0.4.6)
     rexml (3.2.5)
-    rouge (4.1.3)
+    rouge (4.2.0)
     ruby-progressbar (1.13.0)
     sass (3.7.4)
       sass-listen (~> 4.0.0)