Update arguments.md

docs/information/lifecycle/arguments.md

@@ -15,7 +15,7 @@ Arguments are configured in the [manifest](../manifest.md#argument-properties) p
 
 ## Example
 
-Let's say we want a command with two arguments. Its `package.json` will look like this:
+Let's say we want a command with three arguments. Its `package.json` will look like this:
 
 ```json
 {