Update rexml

Addresses:

ruby-advisory-db:
  advisories:   912 advisories
  last updated: 2024-08-02 19:22:00 -0700
  commit:       446f84809ca2f370b7e2880065e066b7c4cb3465
Name: rexml
Version: 3.3.2
CVE: CVE-2024-41123
GHSA: GHSA-r55c-59qm-vjw6
Criticality: Medium
URL:
https://www.ruby-lang.org/en/news/2024/08/01/dos-rexml-cve-2024-41123
Title: DoS vulnerabilities in REXML Solution: upgrade to '>= 3.3.3'

Name: rexml
Version: 3.3.2
CVE: CVE-2024-41946
Criticality: Unknown
URL:
https://www.ruby-lang.org/en/news/2024/08/01/dos-rexml-cve-2024-41946
Title: DoS vulnerabilities in REXML Solution: upgrade to '>= 3.3.3'

Author: rossta

Gemfile.lock

@@ -393,7 +393,7 @@ GEM
     reline (0.5.9)
       io-console (~> 0.5)
     require_all (3.0.0)
-    rexml (3.3.2)
+    rexml (3.3.4)
       strscan
     rouge (4.3.0)
     rspec-core (3.13.0)