fix plural tone

Author: sommeeeer

README.md

@@ -89,7 +89,7 @@ To run `OpenNext` locally:
 
 OpenNext provide you with a warmer function that can be used to reduce cold start.
 
-On Lambda, there is multiple scenario where a lambda will trigger a cold start even if you have some warmed instance. For example if you have more request than warm instance you'll get a cold start. Also NextJs lazy load the routes, so even if you hit a warm instance, this specific route might not have been loaded yet.
+On Lambda, there is multiple scenarios where a lambda will trigger a cold start even if you have some warmed instance. For example if you have more request than warm instance you'll get a cold start. Also NextJs lazy load the routes, so even if you hit a warm instance, this specific route might not have been loaded yet.
 
 ## Acknowledgements