added github as sponsor

Author: ashwaniYDV

index.html

@@ -249,6 +249,13 @@ <h3>Timeline</h3>
           </table>
           <br><br>
           <p>Follow NJACK, IIT Patna on <a href="https://www.facebook.com/njack.iitp/" target="_blank">Facebook</a> and <a href="https://twitter.com/njackiitp" target="_blank">Twitter</a>. Join the <a href="https://gitter.im/NWoC/NWoC2019" target="_blank">Gitter</a> channel for updates.</p>
+
+          <h3>NWoC is sponsored by</h3>
+          <a href="https://www.github.com/" target="_blank"><img class="nwoc-current-sponsors" src="./images/GitHub_Logo_custom.png"/></a>
+          <!-- <a href="https://www.jetbrains.com/" target="_blank"><img class="nwoc-current-sponsors" src="./images/jetbrains-variant-1.png"/></a> -->
+          <!-- <a href="https://www.digitalocean.com/" target="_blank"><img class="nwoc-current-sponsors" src="./images/DO_Logo_Vertical_Blue.png"/></a> -->
+
+
           <div class="sectiontitle">
             <h3 style="text-align: left">NWoC 2018 Statistics</h3>
         </div>