update prop validation phrasing for invalid props behavior

Author: yyx990803

src/guide/components.md

@@ -417,7 +417,7 @@ The `type` can be one of the following native constructors:
 
 In addition, `type` can also be a custom constructor function and the assertion will be made with an `instanceof` check.
 
-When a prop validation fails, Vue will refuse to set the value on the child component and throw a warning if using the development build.
+When a prop validation fails, Vue will produce a console warning (if using the development build).
 
 ## Custom Events