Feature/extend sitemap.xml by resources sub pages in de (#3993)

* Extend sitemap.xml

apps/api/src/assets/sitemap.xml

@@ -56,10 +56,22 @@
     <loc>https://ghostfol.io/de/ressourcen</loc>
     <lastmod>${currentDate}T00:00:00+00:00</lastmod>
   </url>
+  <url>
+    <loc>https://ghostfol.io/de/ressourcen/lexikon</loc>
+    <lastmod>${currentDate}T00:00:00+00:00</lastmod>
+  </url>
+  <url>
+    <loc>https://ghostfol.io/de/ressourcen/maerkte</loc>
+    <lastmod>${currentDate}T00:00:00+00:00</lastmod>
+  </url>
   <url>
     <loc>https://ghostfol.io/de/ressourcen/personal-finance-tools</loc>
     <lastmod>${currentDate}T00:00:00+00:00</lastmod>
   </url>
+  <url>
+    <loc>https://ghostfol.io/de/ressourcen/ratgeber</loc>
+    <lastmod>${currentDate}T00:00:00+00:00</lastmod>
+  </url>
   <url>
     <loc>https://ghostfol.io/de/ueber-uns</loc>
     <lastmod>${currentDate}T00:00:00+00:00</lastmod>