Bump rexml from 3.3.5 to 3.3.9

Bumps [rexml](https://github.com/ruby/rexml) from 3.3.5 to 3.3.9.
- [Release notes](https://github.com/ruby/rexml/releases)
- [Changelog](https://github.com/ruby/rexml/blob/master/NEWS.md)
- [Commits](https://github.com/ruby/rexml/compare/v3.3.5...v3.3.9)

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

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

Gemfile.lock

@@ -72,13 +72,11 @@ GEM
       ffi (~> 1.0)
     rbs (3.5.2)
       logger
-    rexml (3.3.5)
-      strscan
+    rexml (3.3.9)
     rouge (4.3.0)
     safe_yaml (1.0.5)
     sass-embedded (1.77.8-x86_64-linux-gnu)
       google-protobuf (~> 4.26)
-    strscan (3.1.0)
     syntax_tree (6.2.0)
       prettier_print (>= 1.2.0)
     syntax_tree-haml (4.0.3)