Update Schedule Architecture Review button to match gradient theme

Author: saldarji

docs/architecture.md

@@ -118,7 +118,7 @@ title: "DocRouter Architecture"
                 </p>
                 <div class="flex flex-col sm:flex-row gap-4 justify-center items-center">
                     <button onclick="openCalendly()"
-                            class="inline-block bg-blue-600 hover:bg-blue-700 text-white px-8 py-4 rounded-lg font-semibold text-lg transition-colors duration-200">
+                            class="inline-block bg-gradient-to-r from-blue-600 to-purple-600 hover:from-blue-700 hover:to-purple-700 text-white px-8 py-4 rounded-lg font-semibold text-lg transition-colors duration-200">
                         Schedule Architecture Review
                     </button>
                     <a href="https://github.com/analytiq-hub/doc-router"