update tense

Author: nullfunc

docs/concepts/scaling.md

@@ -40,7 +40,7 @@ Instead of manually adding more instances when traffic increases, an auto-scalin
 With Defang, users on the Pro plan or higher can enable service-level autoscaling in three steps:
 
 1. Add the _**x-defang-autoscaling : true**_ extension to the service you want to autoscale.
-2. Removing any _**replicas**_ field in the _**deploy**_ mapping (if present).
+2. Remove any _**replicas**_ field in the _**deploy**_ mapping (if present).
 3. Deploy using staging or production [mode](/docs/concepts/deployments#deployment-modes). (e.g. ```defang compose up --provider=aws --mode=production```)
 
 ```yaml