Bump rexml from 3.3.6 to 3.3.9 in /docs (#102)

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: direct:production
...

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

Author: dependabot[bot]

Diff for: docs/Gemfile

@@ -18,7 +18,7 @@ gem "wdm", "~> 0.1.1", :install_if => Gem.win_platform?
 
 # Vulnerability  fixes
 gem "nokogiri", "~> 1.16.5"
-gem "rexml", "~> 3.3.6"
+gem "rexml", "~> 3.3.9"
 gem "commonmarker", ">= 0.23.10"
 gem "activesupport", "~> 7.0.7.1"
 

Diff for: docs/Gemfile.lock

@@ -225,8 +225,7 @@ GEM
     rb-fsevent (0.11.2)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
-    rexml (3.3.6)
-      strscan
+    rexml (3.3.9)
     rouge (3.26.0)
     ruby2_keywords (0.0.5)
     rubyzip (2.3.2)
@@ -241,7 +240,6 @@ GEM
       faraday (>= 0.17.3, < 3)
     simpleidn (0.2.1)
       unf (~> 0.1.4)
-    strscan (3.1.0)
     terminal-table (1.8.0)
       unicode-display_width (~> 1.1, >= 1.1.1)
     typhoeus (1.4.0)
@@ -267,7 +265,7 @@ DEPENDENCIES
   commonmarker (>= 0.23.10)
   github-pages (~> 228)
   nokogiri (~> 1.16.5)
-  rexml (~> 3.3.6)
+  rexml (~> 3.3.9)
   tzinfo (~> 2.0.6)
   tzinfo-data
   wdm (~> 0.1.1)