Fixed a typo in thread JS.

boards/templates/boards/thread.html

@@ -12,7 +12,7 b''
 {% block content %}
     {% get_current_language as LANGUAGE_CODE %}
 
-    <script src="{% static 'js/thread.js' }%"></script>
+    <script src="{% static 'js/thread.js' %}"></script>
 
 	{% if posts %}
         {% cache 600 thread_view posts.0.last_edit_time moderator LANGUAGE_CODE %}