Snags more strings for i18n

bookwyrm/templates/notfound.html

@@ -1,9 +1,10 @@
 {% extends 'layout.html' %}
+{% load i18n %}
 {% block content %}
 
 <div class="block">
-    <h1 class="title">Not Found</h1>
-    <p>The page your requested doesn't seem to exist!</p>
+    <h1 class="title">{% trans "Not Found" %}</h1>
+    <p>{% trans "The page your requested doesn't seem to exist!" %}</p>
 </div>
 
 {% endblock %}