docs(richtlinien): shorten prerender comment to essentials

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/src/routes/hilfe/transkription/+page.ts

@@ -1,6 +1,3 @@
-// prerender = true is safe here: hooks.server.ts exports
-//   handle = sequence(userGroup, handleAuth, ...)
-// where handleAuth redirects all non-public paths to /login at runtime.
-// Prerendered HTML is served, but the browser still hits handleAuth on
-// every navigation — unauthenticated users are redirected before seeing content.
+// Safe: handleAuth in hooks.server.ts redirects unauthenticated requests
+// before prerendered HTML is visible.
 export const prerender = true;