Merge pull request #251329 from Homebrew/bump-rabbitmq-4.2.0

rabbitmq: update livecheck

Author: chenrui333

Formula/r/rabbitmq.rb

@@ -8,6 +8,7 @@ class Rabbitmq < Formula
   livecheck do
     url :stable
     regex(/^v?(\d+(?:\.\d+)+)$/i)
+    strategy :github_latest
   end
 
   bottle do