Bump rack from 2.2.3 to 2.2.6.3 in /rack/blog#47

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

dependabot/bundler/rack/blog/rack-2.2.6.3igorsimdyanov/ruby:dependabot/bundler/rack/blog/rack-2.2.6.3Copy head branch name to clipboard