Merge pull request #18 from xixu-me/dependabot/github_actions/codecov/codecov-action-6

ci: bump codecov/codecov-action from 5 to 6

.github/workflows/ci.yml

@@ -68,7 +68,7 @@ jobs:
 
       - name: Upload coverage to Codecov
         if: github.event_name == 'push' && github.ref == 'refs/heads/main'
-        uses: codecov/codecov-action@v5
+        uses: codecov/codecov-action@v6
         with:
           files: ./coverage/lcov.info
           fail_ci_if_error: true