add slash to videos link (#329)

Author: recrwplay

src/partials/navbar-end.hbs

@@ -226,7 +226,7 @@
               <a class="project-name" href="https://neo4j.com/blog/developer/" target="_blank">Neo4j Developer Blog</a>
             </div>
             <div class="navbar-item project">
-              <a class="project-name" href="/videos" target="_blank">Neo4j Videos</a>
+              <a class="project-name" href="/videos/" target="_blank">Neo4j Videos</a>
             </div>
           </div>
         </div>