Bump the github-actions group with 2 updates

Bumps the github-actions group with 2 updates: [actions/checkout](https://github.com/actions/checkout) and [codecov/codecov-action](https://github.com/codecov/codecov-action).


Updates `actions/checkout` from 3 to 4
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v3...v4)

Updates `codecov/codecov-action` from 4.0.1 to 4.6.0
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/main/CHANGELOG.md)
- [Commits](codecov/codecov-action@v4.0.1...v4.6.0)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: github-actions
- dependency-name: codecov/codecov-action
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: github-actions
...

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/tests.yml

@@ -23,7 +23,7 @@ jobs:
           POSTGRES_PASSWORD: postgres
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
         fetch-depth: 1
 
@@ -48,7 +48,7 @@ jobs:
         SOCIAL_AUTH_OPENSTAX_SECRET: ${{ secrets.SOCIAL_AUTH_OPENSTAX_SECRET }}
 
     - name: Upload coverage reports to Codecov
-      uses: codecov/codecov-action@v4.0.1
+      uses: codecov/codecov-action@v4.6.0
       with:
         token: ${{ secrets.CODECOV_TOKEN }}
         slug: openstax/openstax-cms