Update index.mdx

Author: masnabinumeed

src/content/docs/index.mdx

@@ -52,7 +52,13 @@ We will use your email to send updates about Digital Design Nizam. Unsubscribe a
 
 <form id="subscribe-form" class="flex gap-4">
   <input type="email" name="email" placeholder="Email" required class="border p-2 min-w-96" />
-  <button type="submit" class="bg-secondary text-white cursor-pointer p-2 px-4">Subscribe</button>
+<button 
+	type="submit" 
+	class="bg-secondary text-white cursor-pointer p-2 px-4" 
+	onclick="this.innerHTML='Subscribing...'; setTimeout(() => { this.innerHTML='Subscribe'; }, 5000);"
+>
+	Subscribe
+</button>
 </form>
 
 <script src="form.js"></script>