Update CHANGELOG for v4.2.0 enhancements

Forwarded messages now display correctly in threads.

Signed-off-by: lorenzo132 <[email protected]>

Author: lorenzo132

CHANGELOG.md

@@ -9,6 +9,7 @@ however, insignificant breaking changes do not guarantee a major version bump, s
 # v4.2.0
 
 Upgraded discord.py to version 2.6.3, added support for CV2.
+Forwarded messages now properly show in threads, rather then showing as an empty embed.
 
 ### Fixed
 - Make Modmail keep working when typing is disabled due to a outage caused by Discord.