updates boilerplate action to use go v1.18 (#2588)
updates boilerplate action to use go v1.18 (#2588)

Signed-off-by: Paul S. Schweigert <a027184a55211cd23e3f3094f1fdc728df5e0500@paulschweigert.com>

Signed-off-by: Paul S. Schweigert <a027184a55211cd23e3f3094f1fdc728df5e0500@paulschweigert.com>
knative/pkg,knative/pkg