www: point link to e2ee FAQ from staging to production

www/nine.testrun.org/index.html

@@ -59,9 +59,9 @@
             <h1>faq</h1>
             <h2>Can i chat with someone outside the chat-mail instance?</h2>
             <p>Yes, if your messages are encrypted.
-            Use <a href="https://staging.delta.chat/746/en/help#howtoe2ee">
+            Use <a href="https://delta.chat/en/help#howtoe2ee">
                 guaranteed end-to-end encryption via QR code scans</a>
-            to setup contact with users outside of the chat-mail instance</p>
+            to setup contact with users outside of the chat-mail instance.</p>
             <h2>What about current rate limits?</h2>
             <ul>
               <li>Sending limit: 60 messages per minute.</li>