King Willem-Alexander of the Netherlands seemingly took a dig at Kate Middleton following the British royal family’s Photoshop scandal, RadarOnline.com has learned. On Tuesday, Willem-Alexander, 56, appeared to mock the PR crisis unfolding across the pond while greeting a group of school-aged children at a royal engagement in Zutphen. As OK Magazine.com reported, while the king was greeting the youngsters, one girl mentioned a photo she saw of the monarch and his family, to which he quipped back with a joke about the Princess of Wales. Willem-Alexander laughed as he told the young girl, “At le…