Bump codecov/codecov-action in the github-actions group

Bumps the github-actions group with 1 update: [codecov/codecov-action](https://github.com/codecov/codecov-action).


Updates `codecov/codecov-action` from 5.4.2 to 5.4.3
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/main/CHANGELOG.md)
- [Commits](codecov/codecov-action@v5.4.2...v5.4.3)

---
updated-dependencies:
- dependency-name: codecov/codecov-action
  dependency-version: 5.4.3
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: github-actions
...

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

Author: dependabot[bot]

.github/workflows/tests.yml

@@ -50,7 +50,7 @@ jobs:
         SOCIAL_AUTH_OPENSTAX_SECRET: ${{ secrets.SOCIAL_AUTH_OPENSTAX_SECRET }}
 
     - name: Upload coverage reports to Codecov
-      uses: codecov/[email protected].2
+      uses: codecov/[email protected].3
       with:
         token: ${{ secrets.CODECOV_TOKEN }}
         slug: openstax/openstax-cms