Add bundler 2.2.1, remove bundler 2.2.0
Add bundler 2.2.1, remove bundler 2.2.0

for stack(s) cflinuxfs3 [#176148532]

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