[dev] change update-changelog.sh to not leave data.tar.xz lying around
[dev] change update-changelog.sh to not leave data.tar.xz lying around

There's more to cleanup, but well, one piece at a time.

Signed-off-by: Stephan Renatus <3d1a7d0a294b6d8e799ad6e122143905f17f9530@chef.io>

juliandunn/chef-server-1,chef/chef-server,juliandunn/chef-server-1,juliandunn/chef-server-1,chef/chef-server,chef/chef-server,juliandunn/chef-server-1,chef/chef-server,juliandunn/chef-server-1,chef/chef-server,chef/chef-server