rtmp-services: Update ingest list for Restream.io

plugins/rtmp-services/data/package.json

 {
 	"url": "https://obsproject.com/obs2_update/rtmp-services",
-	"version": 52,
+	"version": 53,
 	"files": [
 		{
 			"name": "services.json",
-			"version": 52
+			"version": 53
 		}
 	]
 }

plugins/rtmp-services/data/services.json

@@ -636,6 +636,10 @@
                     "name": "Asia (Singapore)",
                     "url": "rtmp://singapore.restream.io/live"
                 },
+                {
+                    "name": "Asia (Seoul, South Korea)",
+                    "url": "rtmp://seoul.restream.io/live"
+                },
                 {
                     "name": "Australia (Sydney)",
                     "url": "rtmp://au.restream.io/live"