message: Let m.notice messages mark a room as unread
  The typescript conversion of Unread.js in matrix-org/matrix-react-sdk#6241
  fixed a 6-year-old typo and stopped messages with msgtype=m.notice from being
  counted as unread messages. This makes it very difficult to use rooms dedicated
  for bot notices (like RSS or GitHub webhook bots).
diff: @@ -43,12 +43,6 @@ export function eventTriggersUnreadCount(ev: MatrixEvent): boolean {
  case EventType.RoomCanonicalAlias:
  case EventType.RoomServerAcl:
  return false;
  -
  - case EventType.RoomMessage:
  - if (ev.getContent().msgtype === MsgType.Notice) {
  - return false;
  - }
  - break;
  }
  if (ev.isRedacted()) return false;
  