Clearly designate blog as external link

Change-Id: Ief96e714717cec8fcd3ab17b25de7e1f04552e5e
diff --git a/index.html b/index.html
index d1a1416..dfe4056 100644
--- a/index.html
+++ b/index.html
@@ -44,7 +44,7 @@
             <a class="nav-link" href="#team"><b><b>Team</b></b></a>
           </li>
           <li class="nav-item mx-2">
-            <a class="nav-link external" href="https://blog.blissroms.com" target="_blank"><b><b>Blog</b></b></a>
+            <a class="nav-link external" href="https://blog.blissroms.com" target="_blank">Blog <i class="fa fa-external-link"></i></a></a>
           </li>
         </ul>
         <a class="btn navbar-btn mx-2 btn-primary" href="#download"><b><b>Download</b></b></a>