[Rspamd] Fix worker-controller-password placeholder

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

@@ -1 +1 @@
-enable_password = "$2$hd67jioinjy4nu6t65tsrb7srexeemp5$tjgnnj3az1gfiqi1tkat7kh8qyoi4gpd5hemkm48k9fmzyf8ypwb";
+# Placeholder