Fix log.

lib/pleroma/web/activity_pub/activity_pub_controller.ex

@@ -43,9 +43,10 @@ def inbox(%{assigns: %{valid_signature: true}} = conn, params) do
 
   def inbox(conn, params) do
     Logger.info("Signature error.")
-    Logger.info(conn.req_headers)
+    Logger.info(inspect(conn.req_headers))
     json(conn, "ok")
   end
+
   def ap_enabled_actor(id) do
     user = User.get_by_ap_id(id)
     if User.ap_enabled?(user) do