Updated RELEASE_NOTES.

RELEASE_NOTES.md

@@ -6,6 +6,8 @@ Added Webmention support for links (Markdown-style or direct) written in a post.
 
 Added new command-line options for list maintenance.
 
+Display custom emoji in more places (contributed by dandelions).
+
 Mastodon API: added `/api/v1/accounts/.../lists` endpoint (contributed by dandelions).
 
 Email notifications can now be sent via `libcurl` SMTP instead of spawning the `/usr/sbin/sendmail` program. To use this new feature, some additional server configuration is needed, see `snac(8)` (contributed by shtrophic).