audit: catch new style gist URLs

Library/Homebrew/cmd/audit.rb

@@ -304,7 +304,8 @@ class FormulaAuditor
 
   def audit_patch(patch)
     case patch.url
-    when %r[raw\.github\.com], %r[gist\.github\.com/raw], %r[gist\.github\.com/.+/raw]
+    when %r[raw\.github\.com], %r[gist\.github\.com/raw], %r[gist\.github\.com/.+/raw],
+      %r[gist\.githubusercontent\.com/.+/raw]
       unless patch.url =~ /[a-fA-F0-9]{40}/
         problem "GitHub/Gist patches should specify a revision:\n#{patch.url}"
       end