Bump rack from 2.2.6.4 to 2.2.8.1 in /api/ruby/building-a-ci-server#39

dependabot[bot] wants to merge 1 commit intomainsarvex/github-platform-samples:mainfrom

dependabot/bundler/api/ruby/building-a-ci-server/rack-2.2.8.1sarvex/github-platform-samples:dependabot/bundler/api/ruby/building-a-ci-server/rack-2.2.8.1Copy head branch name to clipboard