mathlib3

7cc39182 - chore(.github/workflows): update checkout and setup python versions (#18764)

chore(.github/workflows): update checkout and setup python versions (#18764) To stay ahead of the node 12 to node 16 deprecation due "summer 2023" https://github.blog/changelog/2022-09-22-github-actions-all-actions-will-begin-running-on-node16-instead-of-node12/