Update yt_dlp/extractor/youtube/_video.py

Co-authored-by: bashonly <88596187+bashonly@users.noreply.github.com>

yt_dlp/extractor/youtube/_video.py

@@ -3291,7 +3291,7 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
             f'{video_id}: {client_name} client {proto} formats require a GVS PO Token which was not provided. '
             'They will be skipped as they may yield HTTP Error 403. '
             f'You can manually pass a GVS PO Token for this client with --extractor-args "youtube:po_token={client_name}.gvs+XXX". '
-            f'For more information, refer to  {PO_TOKEN_GUIDE_URL} . ')
+            f'For more information, refer to  {PO_TOKEN_GUIDE_URL}')
 
         # Only raise a warning for non-default clients, to not confuse users.
         if client_name in (*self._DEFAULT_CLIENTS, *self._DEFAULT_AUTHED_CLIENTS):