point discord bridge at the public url again

It was fetching avatars from 127.0.0.1

hosts/jokum/services/matrix/discord.nix

@@ -21,9 +21,7 @@ in
     bridge = {
       bindAddress = "localhost";
       domain = "pvv.ntnu.no";
-      # systemd-resolved reads hosts and redirects matrix->jokum->127.0.0.2 which nginx doesnt listen to
-      # this line points the bridge at whatever the ip for the main synapse listener is
-      homeserverUrl = "http://${lib.head (lib.attrNames config.services.nginx.upstreams.synapse_master.servers)}";
+      homeserverUrl = "https://matrix.pvv.ntnu.no";
     };
     provisioning.whitelist = [ "@dandellion:dodsorf\\.as" "@danio:pvv\\.ntnu\\.no"];
     relay.whitelist = [ ".*" ];