Update passed-props.mdx (#935)

* Update passed-props.mdx

Fixed the prop name, `inputColor` should be `$inputColor`

* Update sections/basics/passed-props.mdx

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Co-authored-by: Evan Jacobs <570070+probablyup@users.noreply.github.com>

sections/basics/passed-props.mdx

@@ -25,4 +25,4 @@ render(
 );
 ```
 
-Note how the `inputColor` prop is not passed to the DOM, but `type` and `defaultValue` are. That is styled-components being smart enough to filter non-standard attributes automatically for you.
+Note how the `$inputColor` prop is not passed to the DOM, but `type` and `defaultValue` are? The `styled` function is smart enough to filter non-standard attributes automatically for you.