⬆️ 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] <[email protected]>

.github/workflows/build.yml

@@ -47,7 +47,7 @@ jobs:
       # We don't want to push coverge for every job in the matrix.
       # Rather arbitrarily, choose to push on Ubuntu with Python 3.7.
       if: matrix.python-version == '3.7' && matrix.os == 'ubuntu-latest'  && (github.event_name == 'push' || github.event_name == 'pull_request')
-      uses: codecov/codecov-action@v3
+      uses: codecov/codecov-action@v4
       with:
         file: ./coverage.xml
         # Ignore codecov failures as the codecov server is not