Bump rexml from 3.3.8 to 3.3.9

Bumps [rexml](https://github.com/ruby/rexml) from 3.3.8 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@v3.3.8...v3.3.9)

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

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

Author: dependabot[bot]

Gemfile.lock

@@ -235,7 +235,7 @@ GEM
     rb-fsevent (0.11.2)
     rb-inotify (0.11.1)
       ffi (~> 1.0)
-    rexml (3.3.8)
+    rexml (3.3.9)
     rouge (3.23.0)
     ruby-enum (0.9.0)
       i18n
@@ -259,7 +259,6 @@ GEM
       thread_safe (~> 0.1)
     unicode-display_width (1.8.0)
     uri (0.13.1)
-    wdm (0.2.0)
     webrick (1.8.2)
     zeitwerk (2.6.18)
 
@@ -275,7 +274,6 @@ DEPENDENCIES
   github-pages (~> 208)
   kramdown (>= 2.3.0)
   listen (~> 3.2)
-  wdm (>= 0.1.0)
   webrick (~> 1.8)
 
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