change url of upload_media

wxbot.py

@@ -700,8 +700,8 @@ class WXBot:
         if not os.path.exists(fpath):
             print '[ERROR] File not exists.'
             return None
-        url_1 = 'https://file.wx2.qq.com/cgi-bin/mmwebwx-bin/webwxuploadmedia?f=json'
-        url_2 = 'https://file2.wx2.qq.com/cgi-bin/mmwebwx-bin/webwxuploadmedia?f=json'
+        url_1 = 'https://file.wx.qq.com/cgi-bin/mmwebwx-bin/webwxuploadmedia?f=json'
+        url_2 = 'https://file2.wx.qq.com/cgi-bin/mmwebwx-bin/webwxuploadmedia?f=json'
         flen = str(os.path.getsize(fpath))
         ftype = mimetypes.guess_type(fpath)[0] or 'application/octet-stream'
         files = {