Merge pull request #2472 from freeCodeCamp/renovate/rr-3.x-lockfile

Update dependency rr to v3.1.2

Gemfile.lock

@@ -94,7 +94,7 @@ GEM
       io-console (~> 0.5)
     rexml (3.3.9)
     rouge (1.11.1)
-    rr (3.1.1)
+    rr (3.1.2)
     rss (0.3.1)
       rexml
     ruby2_keywords (0.0.5)