docs: remove out of date admonition (#2114)

Lumen Yang

2025-09-05 a4028289aae22f2a073b2837c3a85d9fc4a86087

 quartz/components/Footer.tsx

@@ -13,7 +13,6 @@
    const links = opts?.links ?? []
    return (
      <footer class={`${displayClass ?? ""}`}>
        <hr />
        <p>
          {i18n(cfg.locale).components.footer.createdWith}{" "}
          <a href="https://quartz.jzhao.xyz/">Quartz v{version}</a> © {year}