What does this MR do?
Bump bundler to latest as of 2020-06-02, per need in https://gitlab.com/gitlab-org/charts/gitlab/-/issues/2752
See Definition of done.
For anything in this list which will not be completed, please provide a reason in the MR discussion
Merge Request Title, and Description are up to date, accurate, and descriptive
MR targeting the appropriate branch
MR has a green pipeline on GitLab.com
Expected (please provide an explanation if not completing)
Test plan indicating conditions for success has been posted and passes
Integration tests added to GitLab QA
The impact any change in container size has should be evaluated