Bump the github-actions group across 1 directory with 3 updates (#1635)

Bumps the github-actions group with 3 updates in the / directory: [actions/checkout](https://github.com/actions/checkout), [actions/setup-python](https://github.com/actions/setup-python) and [codecov/codecov-action](https://github.com/codecov/codecov-action).


Updates `actions/checkout` from 4 to 5
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v4...v5)

Updates `actions/setup-python` from 5 to 6
- [Release notes](https://github.com/actions/setup-python/releases)
- [Commits](actions/setup-python@v5...v6)

Updates `codecov/codecov-action` from 5.4.3 to 5.5.1
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/main/CHANGELOG.md)
- [Commits](codecov/codecov-action@v5.4.3...v5.5.1)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: github-actions
- dependency-name: actions/setup-python
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: github-actions
- dependency-name: codecov/codecov-action
  dependency-version: 5.5.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: github-actions
...

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

Author: dependabot[bot]

.github/workflows/tests.yml

@@ -25,12 +25,12 @@ jobs:
           POSTGRES_DB: oscms_test
 
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
       with:
         fetch-depth: 1
 
     - name: Setup Python and install dependencies
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@v6
       with:
         cache: 'pip'
         python-version-file: '.python-version'
@@ -50,7 +50,7 @@ jobs:
         SOCIAL_AUTH_OPENSTAX_SECRET: ${{ secrets.SOCIAL_AUTH_OPENSTAX_SECRET }}
 
     - name: Upload coverage reports to Codecov
-      uses: codecov/codecov-action@v5.4.3
+      uses: codecov/codecov-action@v5.5.1
       with:
         token: ${{ secrets.CODECOV_TOKEN }}
         slug: openstax/openstax-cms