chore(doc): fix outdated svc-delete doc (#5825)

Update the example command to use the correct flag





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Author: ikorecky

site/content/docs/commands/svc-delete.en.md

@@ -17,7 +17,7 @@ $ copilot svc delete [flags]
 ```
 
 ## Examples
-Force delete the application with environments "test" and "prod".
+Force delete a service from environment "test".
 ```console
-$ copilot svc delete --name test --yes
-```
+$ copilot svc delete --env test --yes
+```