Harvard “researcher” Karen King (who now occupies the oldest, and formerly one of the most prestigious, chairs in America) has devoted her academic life to feminist and anti-Christian “research”.
It is no surprise that she has now “discovered” what is almost certainly a forgery, if she did not create it herself.
That having been said, if Jesus had been married sometime between the age of 12 and when He began His public ministry around age 30, it would not be remarkable to me and it would not affect my faith in the least.
When I went to Catholic high school, one of the topics we discussed in theology was a (now out of print) book "Was Jesus Married?". There were pro's and con's on the subject.
Among the pro's was that Jewish culture at the time had one of the duties of a father being to get his son a suitable wife in his teen years. There was also discussion on whether the wedding where Jesus turned water into wine was His own wedding.
It doesn't really matter one way or the other. He is Who He is, married or not.