chore(deps): update codecov/codecov-action action to v6

Author: renovate[bot]

.github/workflows/ci.yml

@@ -23,7 +23,7 @@ jobs:
       - name: Upload coverage to Codecov
         # Do not run coverage if it's a fork since it won't get access to secrets
         if: github.event.pull_request.head.repo.full_name == github.repository || github.event_name == 'push'
-        uses: codecov/codecov-action@v4
+        uses: codecov/codecov-action@v6
         with:
           file: ./coverage.txt
           token: ${{ secrets.CODECOV_TOKEN }}