Fixes typo in Passing Event Handlers

There's a typo in the code for the Button components of the App component, resulting in an  error in infinite re-rendering, found in the section on Passing Event Handlers to Child Components.

Author: pongbao

src/content/1/en/part1d.md

@@ -1029,9 +1029,9 @@ const App = (props) => {
   return (
     <div>
       {value}
-      <Button handleClick={setToValue(1000)} text="thousand" /> // highlight-line
-      <Button handleClick={setToValue(0)} text="reset" /> // highlight-line
-      <Button handleClick={setToValue(value + 1)} text="increment" /> // highlight-line
+      <Button handleClick={() => setToValue(1000)} text="thousand" /> // highlight-line
+      <Button handleClick={() => setToValue(0)} text="reset" /> // highlight-line
+      <Button handleClick={() => setToValue(value + 1)} text="increment" /> // highlight-line
     </div>
   )
 }