Update de.m3u

- Rename "Offener Kanal Fulda" to OK Fulda to make it consistent with remaining OK channels
- The tvg-id tag is wrong, should be renamed from "OKanalWernigerode.de" to "OKFulda.de"

streams/de.m3u

@@ -211,7 +211,7 @@ https://h056.video-stream-hosting.de/easycast8-live/_definst_/mp4:livestreamhd4/
 https://oberpfalztv.iptv-playoutcenter.de/oberpfalztv/oberpfalztv.stream_1/playlist.m3u8
 #EXTINF:-1 tvg-id="Oeins.de" status="online",oeins (Oldenburg) (1080p) [Not 24/7]
 https://www.oeins.de/live/studio.m3u8
-#EXTINF:-1 tvg-id="OffenerKanalWernigerode.de" status="online",Offener Kanal Fulda
+#EXTINF:-1 tvg-id="OKFulda.de" status="online",OK Fulda
 https://s.ok54.de/mok-fu/livestream/playlist.m3u8
 #EXTINF:-1 tvg-id="OFTVOffenbach.de" status="online",OF-TV Offenbach (720p)
 https://5864df9ceac85.streamlock.net/germanpictures-live/_definst_/mp4:streamschedule/playlist.m3u8