Make release checklist clickable

[brynpickering]

Fixes the release checklist so it's clickable. I find this useful for going through the checklist even if the checkboxes dont persist on refresh.

Reviewer checklist:

• [ ] Test(s) added to cover contribution
• [ ] Documentation updated
• [ ] Changelog updated
• [ ] Coverage maintained or improved

[brynpickering]

only failing due to a codecov upload issue, which we get periodically (I think when multiple jobs workflows are working at the same time)