message: Remove extraneous comma on UPDATE
  A line feed is also removed to ensure the space doesn't get washed away by accident.
  Fixes
diff: @@ -93,8 +93,7 @@ export class DbUserStore {
  await this.db.Run(
  `UPDATE remote_user_data SET displayname = $displayname,
  avatarurl = $avatarurl,
  -avatarurl_mxc = $avatarurl_mxc,
  -WHERE remote_id = $remote_id`,
  +avatarurl_mxc = $avatarurl_mxc WHERE remote_id = $remote_id`,
  {
  avatarurl: user.avatarurl,
  avatarurl_mxc: user.avatarurlMxc,
  