Update changelog

CHANGELOG.md

@@ -33,6 +33,7 @@
 - Added ```/api/v1/mutes``` endpoint [b280d183](https://github.com/pixelfed/pixelfed/commit/b280d183)
 - Added ```/api/v1/accounts/{id}/mute``` endpoint [3e98dce4](https://github.com/pixelfed/pixelfed/commit/3e98dce4)
 - Added ```/api/v1/accounts/{id}/unmute``` endpoint [41c96ddd](https://github.com/pixelfed/pixelfed/commit/41c96ddd)
+- Added ```/api/v1/notifications``` endpoint [39449f36](https://github.com/pixelfed/pixelfed/commit/39449f36)
 
 ### Fixed
 - Update developer settings pages, fix vue bug [cd365ab3](https://github.com/pixelfed/pixelfed/commit/cd365ab3)