Merge pull request #2860 from skoech/add-microceph-sitemap

chore: add MicroCeph docs sitemap

Author: Skazitron

templates/sitemap-index.xml

@@ -147,4 +147,7 @@
   <sitemap>
     <loc>https://canonical.com/data/spark/docs/latest/doc-sitemap.xml</loc>
   </sitemap>
+  <sitemap>
+    <loc>https://canonical.com/ceph/docs/stable/doc-sitemap.xml</loc>
+  </sitemap>
 </sitemapindex>