add specht-labs footer

Author: cedi

docs/.vuepress/plume.config.ts

@@ -22,7 +22,7 @@ export default defineThemeConfig({
 
   footer: {
     message: '<a target="_self" href="/notes/impressum">Impressum</a> - <a target="_self" href="/notes/datenschutz">Datenschutz</a> - Powered by <a target="_blank" href="https://v2.vuepress.vuejs.org/">VuePress</a>',
-    copyright: '&#169; 2025 Cedric Kienzler',
+    copyright: '&#169; 2025 Cedric Kienzler - <a target="_self" href="https://specht-labs.de/">Specht Labs</a>',
   },
 
   /**