fix: Update d/ch for 2.664.53 to include references to seed validation (LP: #2059730)

Add missing references to LP: #2059730.

debian/changelog

@@ -3,6 +3,8 @@ livecd-rootfs (2.664.53) focal; urgency=medium
   [Catherine Redfield]
   * add 5.15 apparmor directory for snap preseeding with 5.15 kernel
     (LP: #2052789)
+  * bind correct apparmor feature for validating snap seed
+    (LP: #2059730)
 
  -- Phil Roche <phil.roche@canonical.com>  Fri, 09 Feb 2024 09:41:18 +0000