Update CHANGELOG.md to reflect the promotion of 1.9.6
Update CHANGELOG.md to reflect the promotion of 1.9.6

Obvious fix; these changes are the result of automation not creative thinking.

chef/knife-windows,ClogenyTechnologies/knife-windows,MsysTechnologiesllc/knife-windows,chef/knife-windows,ClogenyTechnologies/knife-windows,MsysTechnologiesllc/knife-windows