Macworld If you own one or more AirTag device trackers, there’s a new update rolling out to your devices as you read this. But when you’ll get it—and what’s in it—is a mystery. As reported by MacRumors, the firmware update 2A73 (2.0.73) began rolling out Tuesday. Unlike iOS updates, for example, the AirTag gets these updates on a staggered basis, which means some users will have got it right away while others will have to wait anywhere from one to three weeks. The AirTag firmware rollout proceeds as follows: March 19: 1 percent of users get the updateMarch 26: 10 percent of users get the updat…