Completely update Ruby to 2.6.3 for new contributors (!474) · Merge requests · GitLab.org / GitLab Docs · GitLab

Takuya Noguchi requested to merge tnir/gitlab-docs:more-ruby-2.6.3 into master Jun 19, 2019

This is the complement of !462 (merged).

Signed-off-by: Takuya Noguchi takninnovationresearch@gmail.com