Bump rexml from 3.3.6 to 3.3.9

Bumps [rexml](https://github.com/ruby/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: indirect
...

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

Author: dependabot[bot]

Gemfile.lock

@@ -126,8 +126,7 @@ GEM
     regexp_parser (2.9.0)
     reline (0.3.2)
       io-console (~> 0.5)
-    rexml (3.3.6)
-      strscan
+    rexml (3.3.9)
     rubocop (1.62.1)
       json (~> 2.3)
       language_server-protocol (>= 3.17.0)
@@ -161,7 +160,6 @@ GEM
     ruby2_keywords (0.0.5)
     sqlite3 (1.5.4)
       mini_portile2 (~> 2.8.0)
-    strscan (3.1.0)
     thor (1.3.1)
     timeout (0.4.1)
     tzinfo (2.0.6)