Updates only librarian-chef not its dependencies
Updates only librarian-chef not its dependencies

Uses `bundle update --source=librarian-chef` which will only update the source
gem and required dependencies, not all dependencies.

Also updates the Cheffile site.
[#75083494]

wendorf/sprout-git,pivotal-sprout/sprout-git,pivotal-sprout/sprout-git,chendrix/sprout-git,chendrix/sprout-git,wendorf/sprout-git,chendrix/sprout-git,wendorf/sprout-git,pivotal-sprout/sprout-git