docs: removed Dart VM ambiguity (#699)

Author: alestiago

docs/docs/overview.md

@@ -51,9 +51,9 @@ By default port `8080` is used. A custom port can be used via the `--port` optio
 :::
 
 :::tip
-It's also possible to set a custom port for the dart vm service using `--dart-vm-service-port` option.
+It's also possible to set a custom port for the Dart VM service using the `--dart-vm-service-port` argument.
 
-This is required when trying to run `dart_frog dev` multiple times.
+This is required when trying to run multiple `dart_frog dev` commands simultaneously on the same host.
 :::
 
 :::caution