Add GitHub security policy (#2833)
Add GitHub security policy (#2833)


svdv71/Dnn.Platform,robsiera/Dnn.Platform,RichardHowells/Dnn.Platform,svdv71/Dnn.Platform,robsiera/Dnn.Platform,svdv71/Dnn.Platform,RichardHowells/Dnn.Platform,RichardHowells/Dnn.Platform,wael101/Dnn.Platform,RichardHowells/Dnn.Platform,robsiera/Dnn.Platform,wael101/Dnn.Platform,wael101/Dnn.Platform