fix(seo): drop #/login and #/signup from the sitemap (#31)

Two of the three sitemap entries were fragment URLs. ZimPay uses
HashRouter, so those are positions inside one document — Google strips the
fragment and sees the root twice, i.e. a sitemap that is two-thirds
duplicates. Removed rather than rewritten: there is no separate server URL
to point at.

Co-authored-by: Viktor <viktor+ws.dc2abab83928@users.noreply.github.com>

Author: tapiwamakandigona

public/sitemap.xml

@@ -1,18 +1,13 @@
 <?xml version="1.0" encoding="UTF-8"?>
+<!-- ZimPay routes with HashRouter (see src/App.tsx), so #/login and #/signup are
+     fragments of this one document, not separate URLs. Google discards the
+     fragment, which made both entries duplicates of the root — they are removed
+     rather than "fixed", because there is no separate URL to point at. -->
 <urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
   <url>
     <loc>https://zimpay.tapiwa.me/</loc>
+    <lastmod>2026-08-10</lastmod>
     <changefreq>weekly</changefreq>
     <priority>1.0</priority>
   </url>
-  <url>
-    <loc>https://zimpay.tapiwa.me/#/login</loc>
-    <changefreq>monthly</changefreq>
-    <priority>0.8</priority>
-  </url>
-  <url>
-    <loc>https://zimpay.tapiwa.me/#/signup</loc>
-    <changefreq>monthly</changefreq>
-    <priority>0.8</priority>
-  </url>
 </urlset>