Add Anton Gilgur (agilgur5) to Argo Maintainers

[agilgur5]

Adding myself, Anton Gilgur, @agilgur5 to the project-maintainers.csv file to have access to CNCF Support Desk etc.

Also emailed cncf-maintainer-changes@cncf.io according to the README, referencing this PR and using the same email as in my DCO in the commit here

Source:

• Argoproj: https://github.com/argoproj/argoproj/blob/e9828ebaa8e23e6ed21d05aa7ee74556383c41be/MAINTAINERS.md?plain=1#L32
  • Reviewer: https://github.com/argoproj/argoproj/pull/257, https://github.com/argoproj/argoproj/issues/242
  • Approver: https://github.com/argoproj/argoproj/pull/280, https://github.com/argoproj/argoproj/issues/277
• Argo Workflows: https://github.com/argoproj/argo-workflows/blob/74b034c9d1e5315c365e23146addae759c0d0fb3/OWNERS#L6
  • Reviewer: https://github.com/argoproj/argo-workflows/pull/12154
  • Approver: https://github.com/argoproj/argo-workflows/pull/12641