message: Improve comment in ProcessMsgEvent
diff: @@ -198,7 +198,9 @@ export class MatrixEventProcessor {
  opts.file = file;
  }
  - await this.discord.send(embedSet, opts, roomLookup, event); // throws
  + // Throws an `Unstable.ForeignNetworkError` when sending the message fails.
  + await this.discord.send(embedSet, opts, roomLookup, event);
  +
  await this.sendReadReceipt(event);
  }
  