Add 'adp' icon to ChangeLog for version 0.13

Author: RKBoss6

apps/messageicons/ChangeLog

@@ -11,4 +11,4 @@
 0.10: Fix broken PNG icons
 0.11: Add icons for Meshtastic, Gotify. Update icon for Home Assistant. Add icon for "Element Classic" after "Element" has been renamed. (Keeping "Element" as well for backwards compatibility.)
 0.12: Add message icon for 'ntfy'
-0.13: Add icons for 'shortcuts', 'roborock', and 'duolingo'
+0.13: Add icons for 'shortcuts', 'roborock', 'adp', and 'duolingo'