⬆️ Bump rexml from 3.3.0 to 3.3.1

Bumps [rexml](https://github.com/ruby/rexml) from 3.3.0 to 3.3.1.
- [Release notes](https://github.com/ruby/rexml/releases)
- [Changelog](https://github.com/ruby/rexml/blob/master/NEWS.md)
- [Commits](ruby/rexml@v3.3.0...v3.3.1)

---
updated-dependencies:
- dependency-name: rexml
  dependency-type: indirect
  update-type: version-update:semver-patch
...

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

Gemfile.lock

@@ -338,7 +338,7 @@ GEM
     regexp_parser (2.9.2)
     request_store (1.7.0)
       rack (>= 1.4)
-    rexml (3.3.0)
+    rexml (3.3.1)
       strscan
     rollbar (3.5.2)
     rspec (3.13.0)