chore(deps): bump rexml from 3.4.1 to 3.4.2 in /.github/actions/notices_generation (#15342)

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.github/actions/notices_generation/Gemfile.lock

@@ -98,7 +98,7 @@ GEM
       sawyer (~> 0.8.0, >= 0.5.3)
     plist (3.6.0)
     public_suffix (4.0.6)
-    rexml (3.4.1)
+    rexml (3.4.2)
     ruby-macho (2.5.1)
     ruby2_keywords (0.0.2)
     sawyer (0.8.2)