Updated Async Replication to another Filer (markdown)

Async-Replication-to-another-Filer.md

@@ -2,11 +2,11 @@
 
 ![](FilerAsyncReplication.png)
 
-# How it works
+# Requirements
 
 There should be two Seaweed File Systems running, possibly across data centers. Each should have its filer, master, and volume servers.
 
-## Configuration
+# Configuration
 * Configure notification. use "`weed scaffold -config=filer`" to see the notification section.
 
 ```