Added note that Pleroma is not properly supported

config.ini

@@ -16,6 +16,8 @@ token = blahblah
 # Doesn't necessarily yours, it can be any user's ID, but that user should be
 # on the list for crossposter to find it.
 # Setting it to "auto" will just grab yours instead. Don't worry about it
+# EXCEPT if you're using Pleroma. Check #11 issue for more details:
+# https://github.com/hatkidchan/mastoposter/issues/11
 user = auto
 
 # Mastodon user list ID. AGAIN, UNFORTUNATELY, there is no way to reliably use