With it so close to the edge I might trim and re-bind. Other than that I would slip a piece of fusible into the hole and carefully position the flap closed and press to seal. If I had some of the same fabric I might try an invisible matching patch. Of course that won't be noticeable but will still leave a repair spot. I might add an appliqué over it and strategically place a few more appliqués in the border to disguise the addition.