Update: testfile deprecated github actions

[IlyasOsman]

Thank you for contributing to capa! <3

Please read capa's CONTRIBUTING guide if you haven't done so already. It contains helpful information about how to contribute to capa. Check https://github.com/mandiant/capa/blob/master/.github/CONTRIBUTING.md

Please describe the changes in this pull request (PR). Include your motivation and context to help us review.

Updated the actions/checkout and actions/setup-python actions to use the latest version that supports Node.js 20. As someone new to open source, I am eager to contribute and learn from this experience.

Please mention the issue your PR addresses (if any): closes #2120

Checklist

• [x] No CHANGELOG update needed
• [x] No new tests needed
• [x] No documentation update needed

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[mr-tz]

the issue should fix workflows here: https://github.com/mandiant/capa-testfiles/tree/master/.github/workflows we'd like to keep the versions including hashes

[mr-tz]

closed in https://github.com/mandiant/capa-testfiles/pull/238