Fix typo in commet (#16727)

packages/react-reconciler/src/__tests__/ReactHooks-test.internal.js

@@ -431,7 +431,7 @@ describe('ReactHooks', () => {
     expect(root).toMatchRenderedOutput('1');
 
     // Update to the same state. React doesn't know if the queue is empty
-    // because the alterate fiber has pending update priority, so we have to
+    // because the alternate fiber has pending update priority, so we have to
     // enter the render phase before we can bail out. But we bail out before
     // rendering the child, and we don't fire any effects.
     act(() => setCounter(1));