Adds Josianne Hyson as a maintainer for CustomersDot

Trainee maintainer issue: https://gitlab.com/gitlab-com/www-gitlab-com/-/issues/12962

Overview

I joined the Fulfilment purchase team in October 2020 as part of the EoA headcount reset. Since then I have authored 66 merge requests (and reviewed 126).

I have reviewed 29 MRs within my trainee maintainer issue, 18 of which were merged as-is.

Examples of reviews

• https://gitlab.com/gitlab-org/customers-gitlab-com/-/merge_requests/4727
• https://gitlab.com/gitlab-org/customers-gitlab-com/-/merge_requests/4739
• https://gitlab.com/gitlab-org/customers-gitlab-com/-/merge_requests/4674

Things to improve

I tended to miss things the most when I was unfamiliar with a particular area. This shows me that I should make an effort to ask more clarifying questions and not be afraid to ask for more input from domain experts.

One of the main things I missed during the trainee maintainership was not properly following the testing instructions for this MR https://gitlab.com/gitlab-com/www-gitlab-com/-/issues/12962#note_959016301 and missing that it didn't actually resolve the issue. Since that MR I have been more careful to read the instructions and test the changes described properly. This is something I'll need to be much more careful of as a maintainer as there is no reviewer afterwards to catch things!

@cwiesner @shreyasagarwal @tyleramos @vij @vshumilo please chime in below with your thoughts, and approve this MR if you agree.

Developer checklist

• Before this MR is merged
  • Mention CustomersDot maintainers, if not done
  • Assign this issue to your manager
• After this MR is merged
  • Request a maintainer from the #backend_maintainers Slack channel to add you as an Owner to gitlab-org/maintainers/rails-backend
  • Consider adding 'backend maintainer' to your Slack notification keywords

Manager checklist

• Before this MR is merged
  • The MR has been open for 5 working days
  • More than half of the existing maintainers approve the MR (see the maintainer list)
  • There are no blocking concerns raised (if there are, please follow https://about.gitlab.com/handbook/engineering/workflow/code-review/#how-to-become-a-project-maintainer)
• After this MR is merged
  • Announce the good news in the relevant channels listed in https://about.gitlab.com/handbook/engineering/#keeping-yourself-informed