[Postfix] Forgot 'not' in filter

data/Dockerfiles/postfix/syslog-ng.conf

@@ -39,7 +39,7 @@ destination d_redis_cleanup {
   );
 };
 filter f_mail { facility(mail); };
-filter f_skip_local { facility (local0, local1, local2, local3, local4, local5, local6, local7); };
+filter f_skip_local { not facility (local0, local1, local2, local3, local4, local5, local6, local7); };
 log {
   source(s_src);
   filter(f_skip_local);