[#283] Mix Tasks: Fix a typo in relay.ex

lib/mix/tasks/pleroma/relay.ex

@@ -33,7 +33,7 @@ def run(["follow", target]) do
   def run(["unfollow", target]) do
     Common.start_pleroma()
 
-    with {:ok, activity} <- Relay.follow(target) do
+    with {:ok, activity} <- Relay.unfollow(target) do
       # put this task to sleep to allow the genserver to push out the messages
       :timer.sleep(500)
     else