[readme] Update broken link for configuration files

README.md

@@ -241,7 +241,7 @@ To enable this configuration use the `extends` property in your `.eslintrc` conf
 }
 ```
 
-See [ESLint documentation](http://eslint.org/docs/user-guide/configuring#extending-configuration-files) for more information about extending configuration files.
+See [ESLint documentation](https://eslint.org/docs/user-guide/configuring/configuration-files#extending-configuration-files) for more information about extending configuration files.
 
 ## All