Update Prettier editor integration link (facebook#3503)

Author: gaving

packages/react-scripts/template/README.md

@@ -335,7 +335,7 @@ Next we add a 'lint-staged' field to the `package.json`, for example:
 
 Now, whenever you make a commit, Prettier will format the changed files automatically. You can also run `./node_modules/.bin/prettier --single-quote --write "src/**/*.{js,jsx}"` to format your entire project for the first time.
 
-Next you might want to integrate Prettier in your favorite editor. Read the section on [Editor Integration](https://github.com/prettier/prettier#editor-integration) on the Prettier GitHub page.
+Next you might want to integrate Prettier in your favorite editor. Read the section on [Editor Integration](https://prettier.io/docs/en/editors.html) on the Prettier GitHub page.
 
 ## Changing the Page `<title>`