docs: Add Mau Camargo's Notkesto to showcase (#570)

Mau Camargo

2023-11-05 e806c30fa1a7ab941969da01c05ac4adeeeeeb9e

 quartz/plugins/emitters/contentIndex.ts

@@ -68,9 +68,9 @@
    <channel>
      <title>${escapeHTML(cfg.pageTitle)}</title>
      <link>${root}</link>
      <description>${!!limit ? `Last ${limit} notes` : "Recent notes"} on ${
        cfg.pageTitle
      }</description>
      <description>${!!limit ? `Last ${limit} notes` : "Recent notes"} on ${escapeHTML(
        cfg.pageTitle,
      )}</description>
      <generator>Quartz -- quartz.jzhao.xyz</generator>
      ${items}
    </channel>