Bump mixlib-install to 3.11.26
Bump mixlib-install to 3.11.26

This pull request was triggered automatically via Expeditor when mixlib-install 3.11.26 was promoted to Rubygems.

This change falls under the obvious fix policy so no Developer Certificate of Origin (DCO) sign-off is required.

chef/chef-dk,chef/chef-dk,chef/chef-dk