docs(readme): added link to page locale list code

README.md

@@ -200,7 +200,7 @@ You can pass a query parameter `&show=` to show any specific additional stats wi
   </tr>
 </table>
 
-The locale code added to file should be a 2-letter abbreviation from [ISO 639-1](https://www.andiamo.co.uk/resources/iso-language-codes/) or a 4-letter code with a language and country code (eg. `id` or `pt-BR`).
+The locale code added to file should be a 2-letter abbreviation from [ISO 639-1](https://www.andiamo.co.uk/resources/iso-language-codes/) or a 4-letter code with a language and country code (eg. `id` or `pt-BR`). Anything appearing in [the list](https://gist.github.com/FajarKim/91516c2aecbfc8bf65f584d528d5f2b1) should be fine.
 
 ```markdown
 ![GitHub Stats](https://gh-readme-profile.vercel.app/api?username=FajarKim&locale=id)