Update jp.m3u

Added link from https://github.com/iptv-org/iptv/issues/1938#issuecomment-825596727

channels/jp.m3u

@@ -129,3 +129,5 @@ http://redlabmcdn.s.llnwi.net/jp01/ryowa6/tracks-v1a1/mono.m3u8
 https://movie.mcas.jp/mcas/smil:wn1.smil/master.m3u8
 #EXTINF:-1 tvg-id="WOWOWsinema.jp" tvg-name="WOWOWシネマ" tvg-country="JP" tvg-language="Japanese" tvg-logo="" group-title="",WOWOWシネマ (Wowow Cinema)
 http://203.162.235.41:16916
+#EXTINF:-1,Weather Channel (ウェザーニュース) (BS | WNI)
+http://movie.mcas.jp/mcas/wn1_2/master.m3u8