adding link to projects page to home page

Author: utsab

index.html

@@ -25,7 +25,7 @@
             <a href="http://utsab.github.io/blog/index.html">Blog</a>
         </li>
         <li>
-            <a href="#">Portfolio</a>
+            <a href="http://utsab.github.io/projects/index.html">Projects</a>
         </li>
         <li>
             <a href="#">About</a>