Update developer blog link (#327)

Author: recrwplay

src/partials/navbar-end.hbs

@@ -223,7 +223,7 @@
               <a class="project-name" href="http://support.neo4j.com" target="_blank">Product Support</a>
             </div>
             <div class="navbar-item project">
-              <a class="project-name" href="https://medium.com/neo4j" target="_blank">Neo4j Developer Blog</a>
+              <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>