Update api-hooks example README.md

Updated the Vercel deploy link to the correct directory

Author: CrutchTheClutch

examples/api-hooks/README.md

@@ -4,7 +4,7 @@
 
 Deploy your own SWR project with Vercel.
 
-[![Deploy with Vercel](https://vercel.com/button)](https://vercel.com/new/project?template=https://github.com/vercel/swr/tree/master/examples/focus-revalidate)
+[![Deploy with Vercel](https://vercel.com/button)](https://vercel.com/new/project?template=https://github.com/vercel/swr/tree/master/examples/api-hooks)
 
 ## How to Use