Redesign donate page with Ko-fi donation button

Author: nextcortex

donate.html

@@ -397,8 +397,8 @@ <h1><span class="gradient-text">Support</span> our work</h1>
             — makes a real difference.</p>
         <p class="subtitle">100% goes to development & infrastructure costs.</p>
 
-        <a href="https://github.com/nextcortex/nextcortex.github.io.git" class="donate-btn" id="donate-button"
-            target="_blank" rel="noopener noreferrer">
+        <a href="https://ko-fi.com/nextcortex" class="donate-btn" id="donate-button" target="_blank"
+            rel="noopener noreferrer">
             <span class="btn-heart">❤️</span>
             Donate Now
         </a>