docs: update v2.0 release date in changelog (#6118)
docs: update v2.0 release date in changelog (#6118)

Signed-off-by: Alexander Matyushentsev <329929d97ff5ea7c91466c2aa6894d990480f3cf@gmail.com>
argoproj/argo-cd,argoproj/argo-cd,argoproj/argo-cd,argoproj/argo-cd,argoproj/argo-cd