Update docs-chef-io/content/server/upgrade_server.md
Update docs-chef-io/content/server/upgrade_server.md

Co-authored-by: Ian Maddaus <ce83ca0610d0be6b1df5bca6b2cfd5947da02e11@users.noreply.github.com>
Signed-off-by: kagarmoe <44bae274f55382d4f40f7905af05980577fca44a@chef.io>

chef/chef-server,chef/chef-server,chef/chef-server,chef/chef-server,chef/chef-server,chef/chef-server