chore: update sitemap last modified dates.

Author: jamsinclair

website/public/sitemap.xml

@@ -2,13 +2,13 @@
 <urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
   <url>
     <loc>https://marklassian.netlify.app/</loc>
-    <lastmod>2024-01-27</lastmod>
+    <lastmod>2025-09-11</lastmod>
     <changefreq>weekly</changefreq>
     <priority>1.0</priority>
   </url>
   <url>
     <loc>https://marklassian.netlify.app/playground</loc>
-    <lastmod>2024-01-27</lastmod>
+    <lastmod>2025-09-11</lastmod>
     <changefreq>weekly</changefreq>
     <priority>1.0</priority>
   </url>