upgrade yard
upgrade yard

Only used to generate docs, but quiets vulnerability scanners because
this upgrade addresses CVE-2017-17042[1].

[1] https://nvd.nist.gov/vuln/detail/CVE-2017-17042

Signed-off-by: Robb Kidd <11cd4f9ba93acb67080ee4dad8d03929f9e64bf2@chef.io>

robbkidd/supermarket,robbkidd/supermarket,chef/supermarket,chef/supermarket,robbkidd/supermarket,robbkidd/supermarket,chef/supermarket,chef/supermarket,chef/supermarket