chore: fix sitemap

Author: GalvinPython

public/sitemap.xml

@@ -7,7 +7,7 @@
 </url>
 <url>
 <loc>https://sqlitereader.com/convert</loc>
-<lastmod>2025-03-14T00:00:00.000</lastmod>
+<lastmod>2025-03-14T00:00:00.000Z</lastmod>
 <changefreq>daily</changefreq>
 <priority>1</priority>
 </url>