Bumps [actions/setup-python](https://github.com/actions/setup-python) from v2.1.2 to v2.1.3.
- [Release notes](https://github.com/actions/setup-python/releases)
- [Commits](https://github.com/actions/setup-python/compare/v2.1.2...c181ffa198a1248f902bc2f7965d2f9a36c2d7f6

)

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