fix tiny typo on concurrent docs (#2465)

content/docs/concurrent-mode-patterns.md

@@ -183,7 +183,7 @@ function App() {
 It took us only seven lines of code to add this transition:
 
 * We've imported the `useTransition` Hook and used it the component that updates the state.
-* We've passed `{timeoutMs: 3000}` to stay on the previous screeen for at most 3 seconds.
+* We've passed `{timeoutMs: 3000}` to stay on the previous screen for at most 3 seconds.
 * We've wrapped our state update into `startTransition` to tell React it's okay to delay it.
 * We're using `isPending` to communicate the state transition progress to the user.
 
@@ -919,4 +919,4 @@ Keep in mind that `<SuspenseList>` is composable, like anything in React. For ex
 
 Concurrent Mode offers a powerful UI programming model and a set of new composable primitives to help you orchestrate delightful user experiences.
 
-It's a result of several years of research and development, but it's not finished. In the section on [adopting Concurrent Mode](/docs/concurrent-mode-adoption.html), we'll describe how you can try it and what you can expect.
+It's a result of several years of research and development, but it's not finished. In the section on [adopting Concurrent Mode](/docs/concurrent-mode-adoption.html), we'll describe how you can try it and what you can expect.