Change lastmod time for about page in sitemap

Updated last modification time for the about page.

Author: Gmac4247

sitemap.xml

@@ -10,7 +10,7 @@
 
     <url>
         <loc>https://basic-geometry.github.io/about</loc>
-        <lastmod>2025-11-08T20:50:17+02:00</lastmod>
+        <lastmod>2025-11-08T20:50:17+01:00</lastmod>
         <priority>0.9</priority>
     </url>