Bump rexml from 3.2.6 to 3.2.9

Bumps [rexml](https://github.com/ruby/rexml) from 3.2.6 to 3.2.9.
- [Release notes](https://github.com/ruby/rexml/releases)
- [Changelog](https://github.com/ruby/rexml/blob/master/NEWS.md)
- [Commits](ruby/rexml@v3.2.6...v3.2.9)

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

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

Gemfile.lock

@@ -100,7 +100,8 @@ GEM
     rb-inotify (0.10.1)
       ffi (~> 1.0)
     regexp_parser (2.9.1)
-    rexml (3.2.6)
+    rexml (3.2.9)
+      strscan
     rouge (4.2.1)
     rubocop (1.63.5)
       json (~> 2.3)
@@ -137,6 +138,7 @@ GEM
       tilt (~> 2.0)
     sorbet-runtime (0.5.11372)
     stringex (2.8.6)
+    strscan (3.1.0)
     terminal-table (3.0.2)
       unicode-display_width (>= 1.1.1, < 3)
     tilt (2.3.0)