change push url

wxbot.py

@@ -1244,7 +1244,7 @@ class WXBot:
             'synckey': self.sync_key_str,
             '_': int(time.time()),
         }
-        url = 'https://' + self.sync_host + '.weixin.qq.com/cgi-bin/mmwebwx-bin/synccheck?' + urllib.urlencode(params)
+        url = 'https://' + self.sync_host + '.wx.qq.com/cgi-bin/mmwebwx-bin/synccheck?' + urllib.urlencode(params)
         try:
             r = self.session.get(url, timeout=60)
             r.encoding = 'utf-8'