Update RegisterForm links to point to external privacy policy and terms of service

- Change links in the registration form to direct users to the external Datenschutzerklärung and Nutzungsbedingungen pages.
- Ensure links open in a new tab for better user experience.

app/components/Auth/RegisterForm.vue

@@ -139,11 +139,11 @@ const onSubmit = handleSubmit(async (values) => {
     <!-- Terms & Privacy -->
     <p class="text-sm text-white/70 text-center">
       Mit der Registrierung stimmst du unserer
-      <a href="/datenschutz" class="text-accent font-medium transition-all duration-300 hover:brightness-125">
+      <a href="https://www.experimenta.science/datenschutz/" target="_blank" rel="noopener noreferrer" class="text-accent font-medium transition-all duration-300 hover:brightness-125">
         Datenschutzerklärung
       </a>
       und den
-      <a href="/agb" class="text-accent font-medium transition-all duration-300 hover:brightness-125">
+      <a href="https://www.experimenta.science/agb/" target="_blank" rel="noopener noreferrer" class="text-accent font-medium transition-all duration-300 hover:brightness-125">
         Nutzungsbedingungen
       </a>
       zu.