Bump middleman from 4.5.1 to 4.6.0#171

dependabot[bot] wants to merge 2 commits intomf-cs-documentationcontrolshift/slate:mf-cs-documentationfrom

dependabot/bundler/mf-cs-documentation/middleman-4.6.0controlshift/slate:dependabot/bundler/mf-cs-documentation/middleman-4.6.0Copy head branch name to clipboard