fix spelling, replaces -> replaced

docs/AWS_DEPLOYMENT.md

@@ -78,7 +78,7 @@ going to deploy.  Once chosen, invoke deploy.js like this:
 
 
 The output contains instructions for use.  Note that every occurance of 
-`some_name_i_chose` will be replaces with the name *YOU* chose.
+`some_name_i_chose` will be replaced with the name *YOU* chose.
 
 ## deploying code