chore: Add changelog entry

Author: cliffmccarthy

CHANGELOG.md

@@ -5,6 +5,9 @@
 - Check whether GCC is installed in initenv.sh
   ([#608](https://github.com/chatmail/relay/pull/608))
 
+- Automate file ownership setting from host migration process
+  ([#609](https://github.com/chatmail/relay/pull/609))
+
 - Expire push notification tokens after 90 days
   ([#583](https://github.com/chatmail/relay/pull/583))