Fix file_system_id EFS replication usage docs example

Signed-off-by: Yaron Yarimi <yaron.yarimi@env0.com>

website/docs/r/efs_replication_configuration.html.markdown

@@ -51,7 +51,7 @@ resource "aws_efs_replication_configuration" "example" {
   source_file_system_id = aws_efs_file_system.example.id
 
   destination {
-    availability_zone_name = "fs-1234567890"
+    file_system_id = "fs-1234567890"
     region                 = "us-west-2"
   }
 }