Merge pull request #2877 from izmalk/valkey-cassandra-sitemaps

chore: Add Valkey and Cassandra sitemaps to index

Author: Skazitron

templates/sitemap-index.xml

@@ -144,6 +144,12 @@
   <sitemap>
     <loc>https://canonical.com/data/opensearch/docs/latest/sitemap.xml</loc>
   </sitemap>
+  <sitemap>
+    <loc>https://canonical.com/data/valkey/docs/latest/doc-sitemap.xml</loc>
+  </sitemap>
+  <sitemap>
+    <loc>https://canonical.com/data/cassandra/docs/latest/doc-sitemap.xml</loc>
+  </sitemap>
   <sitemap>
     <loc>https://canonical.com/data/spark/docs/latest/doc-sitemap.xml</loc>
   </sitemap>