Spell check (#845)

Author: pastorsj

packages/react-scripts/template/public/index.html

@@ -9,7 +9,7 @@
       It will be replaced with the URL of the `public` folder during the build.
       Only files inside the `public` folder can be referenced from the HTML.
 
-      Unlike "/favicon.ico" or "favico.ico", "%PUBLIC_URL%/favicon.ico" will
+      Unlike "/favicon.ico" or "favicon.ico", "%PUBLIC_URL%/favicon.ico" will
       work correctly both with client-side routing and a non-root public URL.
       Learn how to configure a non-root public URL by running `npm run build`.
     -->