Updates version to 9.6.0
Updates version to 9.6.0

This updates gitversion.yml so that CI builds version 9.6.0
as we decided this would be the next version.

This is a release management task and we are self-approving
it for that reason

nvisionative/Dnn.Platform,bdukes/Dnn.Platform,dnnsoftware/Dnn.Platform,EPTamminga/Dnn.Platform,mitchelsellers/Dnn.Platform,mitchelsellers/Dnn.Platform,nvisionative/Dnn.Platform,valadas/Dnn.Platform,valadas/Dnn.Platform,mitchelsellers/Dnn.Platform,mitchelsellers/Dnn.Platform,nvisionative/Dnn.Platform,valadas/Dnn.Platform,valadas/Dnn.Platform,EPTamminga/Dnn.Platform,EPTamminga/Dnn.Platform,dnnsoftware/Dnn.Platform,dnnsoftware/Dnn.Platform,dnnsoftware/Dnn.Platform,bdukes/Dnn.Platform,dnnsoftware/Dnn.Platform,valadas/Dnn.Platform,bdukes/Dnn.Platform,bdukes/Dnn.Platform,mitchelsellers/Dnn.Platform