rtmp-services: Update twitch.tv ingests

plugins/rtmp-services/data/services.json

@@ -18,6 +18,10 @@
                 "name": "Asia: Seoul, South Korea",
                 "url": "rtmp://live-sel.twitch.tv/app"
             },
+            {
+                "name": "Asia: Seoul, South Korea (2)",
+                "url": "rtmp://live-sel-2.twitch.tv/app"
+            },
             {
                 "name": "Asia: Singapore",
                 "url": "rtmp://live-sin.twitch.tv/app"