fix(`setup`): `open-dkim` log for conflicting implementations (#3899)

target/bin/open-dkim

@@ -5,7 +5,7 @@ source /usr/local/bin/helpers/index.sh
 
 if [[ -f /etc/dms-settings ]] && [[ $(_get_dms_env_value 'ENABLE_RSPAMD') -eq 1 ]]; then
   if [[ $(_get_dms_env_value 'ENABLE_OPENDKIM') -eq 1 ]]; then
-    log 'error' "You enabled Rspamd and OpenDKIM - OpenDKIM will be implicitly used for DKIM keys"
+    _log 'warn' "Conflicting DKIM support, both Rspamd and OpenDKIM enabled - OpenDKIM will manage DKIM keys"
   else
     /usr/local/bin/rspamd-dkim "${@}"
     exit