Added link to official mastodon account and fixed typo

contribute.md

@@ -13,7 +13,8 @@ We love hearing your feedback and questions, and this is the most simple yet
 effective thing you can do to help us. Reach us on the following platforms:
 
 - Matrix: [#funkwhale:matrix.org](https://riot.im/app/#/room/#funkwhale:matrix.org)
-- Mastodon: [@eliotberriot@masodon.eliotberriot.com](https://mastodon.eliotberriot.com/@eliotberriot)
+- Mastodon (official account): [@funkwhale@mastodon.eliotberriot.com](https://mastodon.eliotberriot.com/@funkwhale)
+- Mastodon (maintainer's account): [@eliotberriot@mastodon.eliotberriot.com](https://mastodon.eliotberriot.com/@eliotberriot)
 - Email: contact@eliotberriot.com
 
 ## Use funkwhale and report bugs