website: new CTA slogan — "stop renting your memory"

Replaces the generic "your brain, self-hosted" cliché with a line that
contrasts self-hosting against cloud-SaaS note tools.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

website/index.html

@@ -776,7 +776,7 @@ See also: <span class="link">[[Infra checklist]]</span>
 
 <section class="cta-section">
     <div>
-        <h2>your brain, self-hosted.</h2>
+        <h2>stop renting your memory.</h2>
         <p>Set a password. Start writing. Find everything.</p>
         <div class="cta-links">
             <a href="https://git.uesome.de/tanztee/hyprcrd" class="cta-btn primary">get the source</a>