Update index.html

Author: gokulsatya

index.html

@@ -25,6 +25,7 @@
 							<li><a href="volunteer.html">Volunteer Experience and Additional activities</a></li>
 							<li><a href="projects.html">Projects</a></li>
 							<li><a href="skills.html">Skills</a></li>
+							<li><a href="Certifications.html">Certifications</a></li>
 							<li><a href="#contact">Contact</a></li>
 						</ul>
 					</nav>