[Bugfix] 修复session不显示在线的问题

apps/terminal/tasks.py

@@ -37,7 +37,7 @@ def delete_terminal_status_period():
 def clean_orphan_session():
     active_sessions = Session.objects.filter(is_finished=False)
     for session in active_sessions:
-        if not session.is_active():
+        if session.is_active():
             continue
         session.is_finished = True
         session.date_end = timezone.now()