Use gh to comment on PR

[barmac]

Proposed Changes

This removes the peter-evans action from the workflow which should save us some time updating the action. We don't use the update section of the action anyway.

Solution based on https://docs.github.com/en/actions/use-cases-and-examples/project-management/commenting-on-an-issue-when-a-label-is-added

I used fix in the initial comment to test the new workflow in action.

Checklist

To ensure you provided everything we need to look at your PR:

• Brief textual description of the changes present
• Visual demo attached
• Steps to try out present, i.e. using the @bpmn-io/sr tool
• Related issue linked via Closes {LINK_TO_ISSUE} or Related to {LINK_TO_ISSUE}

[github-actions]

This Pull Request targets develop branch, but contains fix commits.

Consider targeting main instead.

[barmac]

OK it works!

[barmac]

It failed initially because I used issues permission instead of pull_requests.

[nikku]

Great one, and shows how we can simplify our lives 🌟