Update README.md

Author: nathanmadams

amazon_app_mesh/README.md

@@ -199,7 +199,7 @@ partial -->
 [5]: https://docs.aws.amazon.com/app-mesh/latest/userguide/envoy.html
 
 <!-- xxz tab xxx -->
-<!-- xxx tabs xxx -->
+<!-- xxz tabs xxx -->
 
 ## Data Collected