Update vn.m3u

Added link from https://github.com/iptv-org/iptv/issues/2731#issuecomment-834645456

channels/vn.m3u

@@ -29,3 +29,5 @@ http://thtg.vn:8001/thtg.m3u8
 http://210.86.230.202:8134/hls-live/livepkgr/_definst_/liveevent/livestream.m3u8
 #EXTINF:-1 tvg-id="VietMyTV.vn" tvg-name="Việt Mỹ TV" tvg-country="VN" tvg-language="Vietnamese" tvg-logo="https://s30.postimg.org/s0aco3hzl/VIET_MY.png" group-title="",Việt Mỹ TV (480p)
 http://68.235.37.11:1935/vietmagazine/vietmagazine/playlist.m3u8
+#EXTINF:-1 tvg-id="TTV.vn" tvg-name="TTV" tvg-country="VN" tvg-language="Vietnamese" tvg-logo="" group-title="",TTV (406p)
+https://truyenhinh.vnptvas.vn/live.m3u8?c=vstv208&q=high&type=tv&token=1111&gcId=1532&userId=&deviceId=&deviceType=&location=NA&pkg=pkg11