Updated RELEASE_NOTES.

RELEASE_NOTES.md

@@ -1,6 +1,6 @@
 # Release Notes
 
-## UNRELEASED
+## 2.82
 
 The language in which a post is written can now be set from the UI; you must configure the list of languages you usually post in in the User Settings.
 
@@ -16,6 +16,10 @@ Added nodeinfo 2.1 support.
 
 Fixed boosts from the command line not showing in the public timeline (contributed by xvello).
 
+Updated several language files (contributed by zen and daltux).
+
+Retrieving a post's replies is now possible via ActivityPub.
+
 ## 2.81
 
 If the `propagate_local_purge` configuration variable is set to `true` in `server.json`, purged local posts generate a `Delete` activity that is sent everywhere, instead of only deleted from the filesystem.