replace nullnull.org with fuzzy.mailcow.email

data/conf/rspamd/local.d/multimap.conf

@@ -175,7 +175,7 @@ BAD_SUBJECT_00 {
   type = "header";
   header = "subject";
   regexp = true;
-  map = "http://nullnull.org/bad-subject-regex.txt";
+  map = "http://fuzzy.mailcow.email/bad-subject-regex.txt";
   score = 6.0;
   symbols_set = ["BAD_SUBJECT_00"];
 }