plugins.nhkworld: update the plugin to use the new HLS streams
plugins.nhkworld: update the plugin to use the new HLS streams

streamlink/streamlink,chhe/streamlink,wlerin/streamlink,sbstp/streamlink,javiercantero/streamlink,beardypig/streamlink,streamlink/streamlink,melmorabity/streamlink,bastimeyer/streamlink,mmetak/streamlink,ethanhlc/streamlink,ethanhlc/streamlink,fishscene/streamlink,bastimeyer/streamlink,melmorabity/streamlink,fishscene/streamlink,back-to/streamlink,beardypig/streamlink,wlerin/streamlink,javiercantero/streamlink,sbstp/streamlink,gravyboat/streamlink,gravyboat/streamlink,chhe/streamlink,mmetak/streamlink,back-to/streamlink