[Rspamd] Fix IPv6 subnet

data/conf/rspamd/override.d/worker-controller.inc

@@ -4,6 +4,6 @@ secure_ip = "172.16.0.0/12";
 secure_ip = "10.0.0.0/8";
 secure_ip = "127.0.0.1";
 secure_ip = "::1";
-secure_ip = "fd00::/8"
+secure_ip = "fc00::/7"
 .include(try=true; priority=10) "$CONFDIR/override.d/worker-controller-password.inc"
 .include(try=true; priority=20) "$CONFDIR/override.d/worker-controller.custom.inc"