fix(lastmod) Change defaultDateType to "modified" (#1862)

Shane McDonald

2025-03-19 fbca56f2783b9e5bfaeffec990990d4330c31b9d

 .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' }}