Update actions/checkout and actions/setup-python versions

[johnbullnz]

Purpose

Update actions/checkout and actions/setup-python versions to avoid the following warning from GitHub actions:

Node.js 16 actions are deprecated. Please update the following actions to use Node.js 20: actions/checkout@v3, actions/setup-python@v3. For more information see: https://github.blog/changelog/2023-09-22-github-actions-transitioning-from-node-16-to-node-20/.

Does this introduce a breaking change?

[ ] Yes
[x] No

Pull Request Type

What kind of change does this Pull Request introduce?

[ ] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Documentation content changes
[x] Other... Please describe: deprecation warning

How to Test

Push a change to the GitHub repository or manually re-run GitHub action.

What to Check

Verify that the following are valid

• GitHub action completes successfully

[pamelafox]

Thanks! I like to use dependabot for github actions but looks like I neglected to do that here.