Typo in useReducer docs, the initialCount prop is unused (#1376)

* Typo in useReducer docs, the initialCount prop is unused, should be passed to the useReducer hook as initial state

* Fix example

content/docs/hooks-reference.md

@@ -194,7 +194,7 @@ function reducer(state, action) {
 }
 
 function Counter({initialCount}) {
-  const [state, dispatch] = useReducer(reducer, initialState);
+  const [state, dispatch] = useReducer(reducer, {count: initialCount});
   return (
     <>
       Count: {state.count}