Update changelog

CHANGELOG.rst

@@ -18,6 +18,7 @@ v2.0.0 (IN PROGRESS)
 * Added support for 4.3.0 `accounts` endpoint (Thanks AlexKalopsia)
 * Fix version parsing for GoToSocial (Thanks gmemstr)
 * Updated docs to reflect the fact that startign with 4.4.0, the password grant type is no longer supported.
+* Added support for following tags (`followed_tags`, `tag_follow`, `tag_unfollow`, `tag`)
 
 v1.8.1
 ------