⬆️ Update codecov/codecov-action action to v6 (#2016)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/tests.yaml

@@ -72,7 +72,7 @@ jobs:
           poetry run coverage combine coverage*/.coverage*
           poetry run coverage xml -i
       - name: 🚀 Upload coverage report
-        uses: codecov/codecov-action@v5.5.4
+        uses: codecov/codecov-action@v6.0.0
       - name: SonarCloud Scan
         if: github.event.pull_request.head.repo.fork == false
         uses: SonarSource/sonarcloud-github-action@v5.0.0