Fix briefly confusing typo

There are two examples of a text input with initial value  of "Hello!" on this page, a controlled and an uncontrolled. The explanation for the uncontrolled version mistakenly says it works much like the earlier "uncontrolled" example, but the earlier example was the controlled version.

docs/07-forms.md

@@ -102,7 +102,7 @@ If you want to initialize the component with a non-empty value, you can supply a
   }
 ```
 
-This example will function much like the **Uncontrolled Components** example above.
+This example will function much like the **Controlled Components** example above.
 
 Likewise, `<input type="checkbox">` and `<input type="radio">` support `defaultChecked`, and `<select>` supports `defaultValue`.