Fixing the code splitting links in the ESLint output (facebook#5586)

Author: jheijmans

Diff for: packages/eslint-config-react-app/index.js

@@ -167,13 +167,13 @@ module.exports = {
         object: 'require',
         property: 'ensure',
         message:
-          'Please use import() instead. More info: https://github.com/facebook/create-react-app/blob/master/packages/react-scripts/template/README.md#code-splitting',
+          'Please use import() instead. More info: https://facebook.github.io/create-react-app/docs/code-splitting',
       },
       {
         object: 'System',
         property: 'import',
         message:
-          'Please use import() instead. More info: https://github.com/facebook/create-react-app/blob/master/packages/react-scripts/template/README.md#code-splitting',
+          'Please use import() instead. More info: https://facebook.github.io/create-react-app/docs/code-splitting',
       },
     ],
     'getter-return': 'warn',