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>

Author: dependabot[bot]

Gemfile.lock

@@ -160,7 +160,8 @@ GEM
     regexp_parser (2.9.0)
     reline (0.4.2)
       io-console (~> 0.5)
-    rexml (3.2.6)
+    rexml (3.2.8)
+      strscan (>= 3.0.9)
     rubocop (1.60.2)
       json (~> 2.3)
       language_server-protocol (>= 3.17.0)
@@ -204,6 +205,7 @@ GEM
       net-ssh (>= 2.8.0)
     streamio-ffmpeg (3.0.2)
       multi_json (~> 1.8)
+    strscan (3.1.0)
     swagger-blocks (3.0.0)
     thor (1.3.0)
     timeout (0.4.1)