fix faq link

README.md

@@ -19,7 +19,7 @@ Hello, my name is card10:
 - Social Media
   - [`@card10badge@chaos.social`](https://chaos.social/@card10badge)
   - [`twitter.com/card10badge`](https://twitter.com/card10badge)
-- [FAQ](/en/faq)
+- [FAQ](/en/faq.md)
 - Events
   - Previous
      - CCCamp 2019 Badge at #eh19 (easterhegg2019): [Description](https://conference.c3w.at/eh19/talk/DA7KTT/), [Recording](https://media.ccc.de/search/?q=CCCamp+Badge+Talk)