Fix pypy CI runs

[jelmer]

Fix pypy CI runs

[cclauss]

This changed the name of the Required GitHub Action from build (pypy) to build (pypy3.10) which means that GHA runs will not complete until a rename is made in the left panel of https://github.com/testing-cabal/testtools/actions

• https://docs.github.com/en/actions/using-workflows/required-workflows#viewing-workflow-runs-for-required-workflows

Perhaps add build (3.11) and build (3.12) to that Required list.