Mention fixes in debian/changelog

debian/changelog

@@ -21,6 +21,9 @@ apt (0.7.12) UNRELEASED; urgency=low
   [ Christian Perrier ]
   * Fix typos in manpages. Thanks to Daniel Leidert for the fixes
     Closes: #444922
+  * Fix syntax/copitalisation in some messages. Thanks to Jens Seidel
+    for pointing this and providing the patch.
+    Closes: #466845
 
   [ Program translations ]
     - German updated. Closes: #466842