Bump rexml in /bindings/ruby in the bundler group across 1 directory (#300)

Bumps the bundler group with 1 update in the /bindings/ruby directory: [rexml](https://github.com/ruby/rexml).


Updates `rexml` from 3.3.3 to 3.3.6
- [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/v3.3.3...v3.3.6)

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

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

bindings/ruby/Gemfile.lock

@@ -23,7 +23,7 @@ GEM
     rake-compiler-dock (1.5.1)
     rb_sys (0.9.99)
     regexp_parser (2.9.2)
-    rexml (3.3.3)
+    rexml (3.3.6)
       strscan
     rubocop (1.65.0)
       json (~> 2.3)