Server/headscale: override local dns

For some reason extra dns records don't apply without the override

roles/server/headscale.nix

@@ -9,6 +9,7 @@
       dns_config = {
         base_domain = "tailscale";
         nameservers = ["9.9.9.9"];
+        override_local_dns = true;
       };
     };
   };