Clarify automatic updates in deployment. (#27418)

Slightly more clear 😄

docs/deployment.md

@@ -56,7 +56,7 @@ When you deploy your Next.js application, you want to see the latest version wit
 
 Next.js will automatically load the latest version of your application in the background when routing. For client-side navigation, `next/link` will temporarily function as a normal `<a>` tag.
 
-If a new page (with an old version) has already been prefetched by `next/link`, Next.js will use the old version. Then, after either a full page refresh or multiple client-side transitions, Next.js will show the latest version.
+**Note:** If a new page (with an old version) has already been prefetched by `next/link`, Next.js will use the old version. Then, after either a full page refresh or multiple client-side page transitions, Next.js will show the latest version.
 
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