fix(deps): bump actions/checkout from 2 to 3 (#34)

Bumps [actions/checkout](https://github.com/actions/checkout) from 2 to 3.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](https://github.com/actions/checkout/compare/v2...v3)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/update-python-deps.yml

@@ -37,7 +37,7 @@ jobs:
         private_key: ${{ secrets.DEPS_UPDATER_PRIVATE_KEY }}
 
     - name: Git Checkout
-      uses: actions/checkout@v2 # https://github.com/actions/checkout
+      uses: actions/checkout@v3 # https://github.com/actions/checkout
       with:
         token: ${{ steps.generate_token.outputs.token }}