Reset button should set the state back to initialCount (reactjs#1327)

Author: itaditya

content/docs/hooks-reference.md

@@ -54,7 +54,7 @@ function Counter({initialCount}) {
   return (
     <>
       Count: {count}
-      <button onClick={() => setCount(0)}>Reset</button>
+      <button onClick={() => setCount(initialCount)}>Reset</button>
       <button onClick={() => setCount(prevCount => prevCount + 1)}>+</button>
       <button onClick={() => setCount(prevCount => prevCount - 1)}>-</button>
     </>