[core-workflow] How to retrigger appveyor?

PRs https://github.com/python/cpython/pull/5775 and https://github.com/python/cpython/pull/5776 are 5 days old, but appveyor never started. Any other way to retrigger appveyor, other than closing and re-opening the PRs? Thanks. Mariatta Wijaya ᐧ