rabbitmq: update livecheck

Signed-off-by: Rui Chen <[email protected]>

Author: BrewTestBot

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