fix: maybeDates will change children dates (#1843)

Yes365

2025-03-17 c0b73ddaa40576bc391ce9bba0eea922a9a84524

 .github/workflows/ci.yaml

@@ -45,7 +45,7 @@
        run: npm test

      - name: Ensure Quartz builds, check bundle info
        run: npx quartz build --bundleInfo
        run: npx quartz build --bundleInfo -d docs

  publish-tag:
    if: ${{ github.repository == 'jackyzha0/quartz' && github.ref == 'refs/heads/v4' }}