docs: update hero tagline on website to match README

Author: tompassarelli

docs/index.html

@@ -32,7 +32,7 @@
   <section class="hero">
     <img src="https://github.com/user-attachments/assets/7ebd8f20-2846-4e0e-9d9f-de563a589805" alt="Palefox logo" class="hero-logo" />
     <h1>Palefox</h1>
-    <p>Zen Browser-level sidebar UX for Firefox. No fork, no build.</p>
+    <p>A developer-focused alternative to Zen Browser on upstream Firefox</p>
     <div class="hero-actions">
       <a href="https://github.com/tompassarelli/palefox/blob/main/docs/install.md" class="btn btn-primary">Install</a>
       <a href="https://github.com/tompassarelli/palefox" class="btn btn-secondary">GitHub</a>