message: fix odd syntax
diff: @@ -579,14 +579,13 @@ export class DiscordBot {
  info.h = attachment.height;
  }
  rooms.forEach((room) => {
  - const prom = intent.sendMessage(room, {
  + intent.sendMessage(room, {
  body: attachment.filename,
  info,
  msgtype,
  url: content.mxcUrl,
  external_url: attachment.url,
  - });
  - prom.then((res) => {
  + }).then((res) => {
  const evt = new DbEvent();
  evt.MatrixId = res.event_id + ";" + room;
  evt.DiscordId = msg.id;
  