[rubygems/rubygems] Fix grammar in bundle config deprecation message
bundle config
https://github.com/rubygems/rubygems/commit/d23b3d61ac
[rubygems/rubygems] Fix grammar in
bundle config
deprecation messagehttps://github.com/rubygems/rubygems/commit/d23b3d61ac