fix typo

src/react-render-perf/lesson-02/content.mdx

@@ -151,7 +151,7 @@ const Bar = React.memo(() => {
   the long term I think we should evaluate possible replaces for <code>redux</code> that don't
   have this preformance issue like <code>jotai</code>, <code>zustand</code>, or <code>recoil.js</code>.
 - <code>React.useMemo(callback)</code> and <code>React.memo(Component, arePropsEqual?)</code> are
-  both use to memoize things.  The former is used for memoizing computations _within_ a functional
+  both used to memoize things.  The former is used for memoizing computations _within_ a functional
   component while the latter is used for memoizing functional components themselves.
 
 ## Exercise