Adds social.wxcafe.net

docs/Using-Mastodon/List-of-Mastodon-instances.md

@@ -21,5 +21,6 @@ There is also a list at [instances.mastodon.xyz](https://instances.mastodon.xyz)
 | [social.mashek.net](https://social.mashek.net) |Themed and customised for Mashekstein Labs community. Selectively federates.|Yes|No|
 | [masto.themimitoof.fr](https://masto.themimitoof.fr) |N/A|Yes|Yes|
 | [social.imirhil.fr](https://social.imirhil.fr) |N/A|No|Yes|
+| [social.wxcafe.net](https://social.wxcafe.net) |Open registrations, federates everywhere, no moderation yet|Yes|Yes|
 
 Let me know if you start running one so I can add it to the list! (Alternatively, add it yourself as a pull request).