Fix: reeplace to app:title

views/layout/layout.html

@@ -5,7 +5,7 @@
   <meta charset="utf-8">
   <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
 
-  <title>{% block html_title %}{% endblock %} {{ config.crowi['app.title']|default('Crowi') }}</title>
+  <title>{% block html_title %}{% endblock %} {{ config.crowi['app:title']|default('Crowi') }}</title>
   <meta name="description" content="">
   <meta name="author" content="">