No worry is involved. Doesn't take much to point out a typo.Like me my mother used to say, stop worrying about what others are doing or aren't doing, because you've got plenty to worry about yourself...
It takes a heck lot more energy to get offended, feel personally targeted, and then lash out at others. Even nitrogen triiodide isn't this sensitive.
Just quietly accepting that a typo was made takes the least effort of all. Cheers.