Update US.m3u (Adding KGO, WABC ,WPVI News Stream)

This is My First Pull Request.
Pull Request to Adding KGO(https://github.com/iptv-org/iptv/issues/5626), WABC(https://github.com/iptv-org/iptv/issues/5627), WPVI(https://github.com/iptv-org/iptv/issues/5628) TV's News Stream.
Notice That Link Will Redirect to m3u8 Link.

channels/us.m3u

@@ -1743,3 +1743,9 @@ https://thegateway.app/YouToo/CueTones/playlist.m3u8
 https://thegateway.app/YouToo/YTamerica/playlist.m3u8
 #EXTINF:-1 tvg-id="KanalDisney.us" tvg-country="RU" tvg-language="Russian" tvg-logo="https://i.imgur.com/Q9KoVy9.png" group-title="Kids",Канал Disney (576p) [Not 24/7]
 http://188.40.68.167/russia/disney/playlist.m3u8
+#EXTINF:-1 tvg-id="WABCTV.us" tvg-country="US" tvg-logo="" tvg-language="English" group-title="News",WABC-TV News (720p)
+https://api.abcotvs.com/v3/wabc/m3u8/url?id=503123&key=yuemix
+#EXTINF:-1 tvg-id="WPVITV.us" tvg-country="US" tvg-logo="" tvg-language="English" group-title="News" WPVI-TV News (720p)
+https://api.abcotvs.com/v3/wpvi/m3u8/url?id=531099&key=yuemix
+#EXTINF:-1 tvg-id="KGOTV.us" tvg-country="US" tvg-logo="" tvg-language="English" group-title="News" KGO-TV News (720p)
+https://api.abcotvs.com/v3/kgo/m3u8/url?id=530971&key=yuemix