build(deps): bump rexml from 3.2.6 to 3.2.8

Bumps [rexml](https://github.com/ruby/rexml) from 3.2.6 to 3.2.8.
- [Release notes](https://github.com/ruby/rexml/releases)
- [Changelog](https://github.com/ruby/rexml/blob/master/NEWS.md)
- [Commits](ruby/rexml@v3.2.6...v3.2.8)

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

Signed-off-by: dependabot[bot] <support@github.com>

Gemfile.lock

@@ -23,6 +23,7 @@ GEM
     ffi (1.16.3)
     forwardable-extended (2.6.0)
     google-protobuf (3.25.1-arm64-darwin)
+    google-protobuf (3.25.1-x86_64-linux)
     http_parser.rb (0.8.0)
     i18n (1.14.1)
       concurrent-ruby (~> 1.0)
@@ -70,11 +71,15 @@ GEM
     rb-fsevent (0.11.2)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
-    rexml (3.2.6)
+    rexml (3.2.8)
+      strscan (>= 3.0.9)
     rouge (4.2.0)
     safe_yaml (1.0.5)
     sass-embedded (1.69.5-arm64-darwin)
       google-protobuf (~> 3.23)
+    sass-embedded (1.69.5-x86_64-linux-gnu)
+      google-protobuf (~> 3.23)
+    strscan (3.1.0)
     terminal-table (3.0.2)
       unicode-display_width (>= 1.1.1, < 3)
     thread_safe (0.3.6)
@@ -88,6 +93,7 @@ GEM
 
 PLATFORMS
   arm64-darwin-22
+  x86_64-linux
 
 DEPENDENCIES
   jekyll (~> 4.3.2)