Add bundler 2.2.27, remove bundler 2.2.26
Add bundler 2.2.27, remove bundler 2.2.26

for stack(s) cflinuxfs3 [#179461574]

cloudfoundry/ruby-buildpack,cloudfoundry/ruby-buildpack,cloudfoundry/ruby-buildpack,cloudfoundry/ruby-buildpack,cloudfoundry/ruby-buildpack