nixos/release-notes: document ncdns incompatible changes

nixos/doc/manual/from_md/release-notes/rl-2205.section.xml

@@ -504,6 +504,13 @@
           </listitem>
         </itemizedlist>
       </listitem>
+      <listitem>
+        <para>
+          In the ncdns module, the default value of
+          <literal>services.ncdns.address</literal> has been changed to
+          the IPv6 loopback address (<literal>::1</literal>).
+        </para>
+      </listitem>
       <listitem>
         <para>
           <literal>openssh</literal> has been update to 8.9p1, changing

nixos/doc/manual/release-notes/rl-2205.section.md

@@ -160,6 +160,8 @@ In addition to numerous new and upgraded packages, this release has the followin
       (`services.pdns-recursor.dns.address`, `services.pdns-recursor.dns.allowFrom`);
     - allow only local connections to the REST API server (`services.pdns-recursor.api.allowFrom`).
 
+- In the ncdns module, the default value of `services.ncdns.address` has been changed to the IPv6 loopback address (`::1`).
+
 - `openssh` has been update to 8.9p1, changing the FIDO security key middleware interface.
 
 - `services.k3s.enable` no longer implies `systemd.enableUnifiedCgroupHierarchy = false`, and will default to the 'systemd' cgroup driver when using `services.k3s.docker = true`.