Bump codecov/codecov-action from 3 to 4 (#146)

* Bump codecov/codecov-action from 3 to 4

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from 3 to 4.
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/main/CHANGELOG.md)
- [Commits](codecov/codecov-action@v3...v4)

---
updated-dependencies:
- dependency-name: codecov/codecov-action
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

* Need working-directory instead of directory.

Ref: codecov/codecov-action#1258 (comment)

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Felix Fontein <felix@fontein.de>

.github/workflows/nox.yml

@@ -68,9 +68,9 @@ jobs:
           nox -v -e coverage --reuse-existing-virtualenvs --no-install
       - name: Upload coverage
         if: ${{ matrix.codecov }}
-        uses: codecov/codecov-action@v3
+        uses: codecov/codecov-action@v4
         with:
-          directory: antsibull-changelog
+          working-directory: antsibull-changelog
           name: "${{ matrix.session }}"
         env:
           CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}