Update debian changelog

Author: salcock

debian/changelog

@@ -11,6 +11,9 @@ openli (1.1.8-1) unstable; urgency=medium
     requirements for HI1 operations and keep alive messages.
   * Keep alive messages for NL agencies now conform to the ETSI-IP.nl
     requirements.
+  * Use '--' instead of 'NA' as the auth and delivery country code for
+    keep alives when we do not know the country code for the receiving
+    agency.
 
  -- Shane Alcock <[email protected]>  Wed, 14 Aug 2024 10:13:28 +1200