Auto apply Hackathon label and link with tracking issue for FY23Q2 Hackathon

Summary

This issue is for requesting triage automation on a given project. Please link to the project needed and select from a list of triage automation rules to be added.

Project: https://gitlab.com/gitlab-com, https://gitlab.com/gitlab-org

• Automation that does not require an assignee.
  • Labelling Hackathon on any Community contribution labeled MR during May 9th, 12 pm UTC (noon), and May 13th 12 pm UTC (noon)
  • Leaving the following comment:

` This MR will be considered part of the quarterly GitLab Hackathon for a chance to win a prize.

Can you make sure this MR is mentioning/linking the relevant it's attempting to close?

Thank you for your contribution!`

cc @kwiebers