Link to elastalert2

Author: Qmando

README.md

@@ -1,4 +1,5 @@
-Recent changes: As of Elastalert 0.2.0, you must use Python 3.6. Python 2 will not longer be supported.
+**ElastAlert is no longer maintained. Please use [ElastAlert2](https://github.com/jertel/elastalert2) instead.**
+
 
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