DS - Add scroll CSS and algorithm icon

Author: Amey-Thakur

DS/index.html

@@ -216,7 +216,7 @@ <h1>Data Structures Lab</h1>
             <div class="mt-4 text-center" style="animation: fadeInDown 1s ease 0.5s both;">
                 <a href="#interactive-demo" class="scroll-link">
                     <i class="fas fa-chevron-down"></i>
-                    Scroll down for Interactive Algorithm Visualizations
+                    <i class="fas fa-chart-bar"></i> Scroll down for Interactive Algorithm Visualizations
                     <i class="fas fa-chevron-down"></i>
                 </a>
             </div>