Bump actions/setup-python from v1 to v2.2.1
Bumps [actions/setup-python](https://github.com/actions/setup-python) from v1 to v2.2.1.
- [Release notes](https://github.com/actions/setup-python/releases)
- [Commits](https://github.com/actions/setup-python/compare/v1...3105fb18c05ddd93efea5f9e0bef7a03a6e9e7df)
Signed-off-by: dependabot[bot] <support@github.com>