chore(deps): bump rexml from 3.3.6 to 3.3.9 in the bundler group

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


Updates `rexml` from 3.3.6 to 3.3.9
- [Release notes](https://github.com/ruby/rexml/releases)
- [Changelog](https://github.com/ruby/rexml/blob/master/NEWS.md)
- [Commits](ruby/rexml@v3.3.6...v3.3.9)

---
updated-dependencies:
- dependency-name: rexml
  dependency-type: direct:production
  dependency-group: bundler
...

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

Gemfile.lock

@@ -75,8 +75,7 @@ GEM
     rdoc (6.7.0)
       psych (>= 4.0.0)
     redcarpet (3.6.0)
-    rexml (3.3.6)
-      strscan
+    rexml (3.3.9)
     ruby-enum (0.9.0)
       i18n
     rubypants (0.7.1)
@@ -85,7 +84,6 @@ GEM
       crass (~> 1.0.2)
       nokogiri (>= 1.12.0)
     stringio (3.1.1)
-    strscan (3.1.0)
     tdiff (0.4.0)
     twitter-text (1.14.7)
       unf (~> 0.1.0)