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

Author: renovate[bot]

.github/workflows/coverage.yml

@@ -39,7 +39,7 @@ jobs:
         run: pnpm test:coverage
 
       - name: Upload code coverage to codecov.io
-        uses: codecov/codecov-action@v5
+        uses: codecov/codecov-action@v6
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
           directory: ./coverage