Update github action runner to use `macos > 10.15`

[FirelightFlagboy]

The macos-10.15 runner will soon be removed (by the end of the month), This change will impact our packaging system for macos.

We previously tried using a more up to date version of the runner but without any success when building the wheel because the used python seemed to be compatible only for macos-10.15

https://github.blog/changelog/2022-07-20-github-actions-the-macos-10-15-actions-runner-image-is-being-deprecated-and-will-be-removed-by-8-30-22/