Update gr.m3u

channels/gr.m3u

@@ -165,6 +165,8 @@ https://live.streams.ovh/YourStreaming/YourStreaming/playlist.m3u8
 http://tv.nrg91.gr:1935/onweb/live/master.m3u8
 #EXTINF:-1 tvg-id="NRGTV.gr" tvg-name="NRG TV" tvg-country="GR" tvg-language="" tvg-logo="https://i.imgur.com/1Zl1OJ5.png" group-title="",NRG TV (720p)
 https://5c389faa13be3.streamlock.net:9553/onweb/live/playlist.m3u8
+#EXTINF:-1 tvg-id="NSTV.gr" tvg-name="NS TV" tvg-country="GR" tvg-language="" tvg-logo="https://i.imgur.com/tZnziRp.jpg" group-title="",NS TV (720p) [Not 24/7]
+http://176.9.123.140:1935/nstv1/stream/playlist.m3u8
 #EXTINF:-1 tvg-id="OPENTVBUP.gr" tvg-name="OPEN TV BUP" tvg-country="GR" tvg-language="" tvg-logo="https://i.imgur.com/c9hgL1c.jpg" group-title="",OPEN TV BUP
 http://78.83.87.222:9999/play/a013/index.m3u8
 #EXTINF:-1 tvg-id="tvopen.gr" tvg-name="Open TV HD" tvg-country="GR" tvg-language="Modern Greek (1453-)" tvg-logo="https://i.imgur.com/M6XG03v.png" group-title="",Open TV HD (576p)