Jessica Biel is just like Us moms when it comes to getting handwritten notes from the kids. The actress, 43, shared photos of flowers and a note that her sons, Silas, 10, and Phineas, 4, gave to her as she was battling a “summer cold.” “My kids are the best ♥️,” she captioned the post via Instagram on Thursday, August 21. (Biel shares her sons with husband Justin Timberlake.) The letter, written on a paper towel nonetheless, read (in all caps): “We hope you feel better soon Mommy. We love you!!!” Hearts adorned the paper towel note, which was attached…