Tom Kaulitz and Heidi Klum Stefanie Keenan/VF23/WireImage for Vanity Fair Heidi Klum cheered on her son Henry at his high school graduation. “CONGRATULATIONS HENRY. We are all sooo proud of you ❤️,” Klum, 51, wrote via Instagram on Friday, June 7, alongside a carousel of several videos which show Henry, 18, in his blue cap…