Merge pull request #902 from objectionary/renovate/codecov-codecov-action-6.x

Update codecov/codecov-action action to v6

Author: yegor256

.github/workflows/codecov.yml

@@ -33,7 +33,7 @@ jobs:
       - name: Run tests with coverage
         run: npm run coverage
       - name: Upload coverage to Codecov
-        uses: codecov/codecov-action@v5
+        uses: codecov/codecov-action@v6
         with:
           files: ./coverage/lcov.info
           flags: unittests