Bump rexml from 3.3.9 to 3.4.2

Bumps [rexml](https://github.com/ruby/rexml) from 3.3.9 to 3.4.2.
- [Release notes](https://github.com/ruby/rexml/releases)
- [Changelog](https://github.com/ruby/rexml/blob/master/NEWS.md)
- [Commits](ruby/rexml@v3.3.9...v3.4.2)

---
updated-dependencies:
- dependency-name: rexml
  dependency-version: 3.4.2
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

Gemfile.lock

@@ -119,7 +119,7 @@ GEM
     rchardet (1.8.0)
     reverse_markdown (2.1.1)
       nokogiri
-    rexml (3.3.9)
+    rexml (3.4.2)
     rouge (4.4.0)
     safe_yaml (1.0.5)
     sass-embedded (1.79.1-arm64-darwin)