Bump rack from 2.2.2 to 2.2.3 in /ruby-lab-books#2

dependabot[bot] wants to merge 1 commit intomasteraniats/ruby:masterfrom

dependabot/bundler/ruby-lab-books/rack-2.2.3aniats/ruby:dependabot/bundler/ruby-lab-books/rack-2.2.3Copy head branch name to clipboard