Bump rexml from 3.3.3 to 3.3.6 in /.github/actions/notices_generation (#13532)

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

Author: dependabot[bot]

.github/actions/notices_generation/Gemfile.lock

@@ -79,7 +79,7 @@ GEM
       sawyer (~> 0.8.0, >= 0.5.3)
     plist (3.6.0)
     public_suffix (4.0.6)
-    rexml (3.3.3)
+    rexml (3.3.6)
       strscan
     ruby-macho (2.5.1)
     ruby2_keywords (0.0.2)