Bump codecov/codecov-action from 3.0.0 to 3.1.0 (#16)

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from 3.0.0 to 3.1.0.
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/master/CHANGELOG.md)
- [Commits](codecov/codecov-action@v3.0.0...v3.1.0)

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

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

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

Author: dependabot[bot]

.github/workflows/ci.yaml

@@ -58,7 +58,7 @@ jobs:
           python -m pytest
 
       - name: Upload code coverage to Codecov
-        uses: codecov/codecov-action@v3.0.0
+        uses: codecov/codecov-action@v3.1.0
         with:
           file: ./coverage.xml
           flags: unittests