Update client-only.js (#19884)

typos

examples/with-apollo/pages/client-only.js

@@ -8,7 +8,7 @@ const ClientOnlyPage = (props) => (
   <App>
     <Header />
     <InfoBox>
-      ℹ️ This page shows how use Apollo only in the client. If you{' '}
+      ℹ️ This page shows how to use Apollo only in the client. If you{' '}
       <a href="/client-only">reload</a> this page, you will see a loader since
       Apollo didn't fetch any data on the server. This is useful when the page
       doesn't have SEO requirements or blocking data fetching requirements.

examples/with-electron/README.md

 # Electron application example
 
-This example show how you can use Next.js inside an Electron application to avoid a lot of configuration, use Next.js router as view and use server-render to speed up the initial render of the application.
+This example shows how you can use Next.js inside an Electron application to avoid a lot of configuration. It uses the Next.js router as view and server-render to speed up the initial render of the application.
 
-For development it's going to run a HTTP server and let Next.js handle routing. In production it use `next export` to pre-generate HTML static files and use them in your app instead of running an HTTP server.
+For development it's going to run an HTTP server and let Next.js handle routing. In production it uses `next export` to pre-generate HTML static files and uses them in your app instead of running an HTTP server.
 
 **You can find a detailed documentation about how to build Electron apps with Next.js [here](https://leo.im/2017/electron-next)!**