fix rtl link

Author: alexkrolick

docs/example-react-hooks.md

@@ -2,7 +2,8 @@
 id: example-react-hooks
 title: React Hooks
 ---
-[`react-hooks-testing-library`][gh] is built on top of [`react-testing-library`][gh] to create a simple test harness for [React hooks](https://reactjs.org/docs/hooks-intro.html) that handles running them within the body of a function component, as well as providing various useful utility functions for updating the inputs and retrieving the outputs of your [custom hook](https://reactjs.org/docs/hooks-custom.html).
+
+[`react-hooks-testing-library`][gh] is built on top of [`react-testing-library`](/react) to create a simple test harness for [React hooks](https://reactjs.org/docs/hooks-intro.html) that handles running them within the body of a function component, as well as providing various useful utility functions for updating the inputs and retrieving the outputs of your [custom hook](https://reactjs.org/docs/hooks-custom.html).
 
 > **Note**
 >
@@ -67,4 +68,4 @@ test('should decrement counter', () => {
 
   expect(result.current.count).toBe(-3)
 })
-```
+```