Add Element-Call details to Matrix client well-known

Author: olmari

matrix-well-known-client

@@ -11,5 +11,11 @@ permalink: .well-known/matrix/client
     },
     "m.tile_server": {
          "map_style_url": "https://api.maptiler.com/maps/streets/style.json?key=fU3vlMsMn4Jb6dnEIFsx"
-    }
+    },
+    "org.matrix.msc4143.rtc_foci": [
+        {
+            "type": "livekit",
+            "livekit_service_url": "livekit.matrix.hacklab.fi"
+        }
+    ]
 }