Updated changelog

Author: Taaku18

CHANGELOG.md

@@ -15,6 +15,7 @@ however, insignificant breaking changes do not guarantee a major version bump, s
 
 ### Added
 - New .env config option: `REGISTRY_PLUGINS_ONLY`, restricts to only allow adding registry plugins. ([PR #3247](https://github.com/modmail-dev/modmail/pull/3247))
+- `?log key <key>` to retrieve the log link and view a preview using a log key. ([PR #3196](https://github.com/modmail-dev/Modmail/pull/3196))
 
 ### Changed
 - Guild icons in embed footers and author urls now have a fixed size of 128. ([PR #3261](https://github.com/modmail-dev/modmail/pull/3261))