Update graphviz 2.38 url (#1884)
Update graphviz 2.38 url (#1884)


kodybrown/scoop,Cyianor/scoop,nikolasd/scoop,rasa/scoop,vidarkongsli/scoop,coonce/scoop,lukesampson/scoop,berwyn/scoop,reelsense/scoop,yunspace/scoop