Fixes link in the exam page

Link with name "Back to rating". The bug was caused by editing some routes.

~dev_rating/application/views/teacher/discipline/rating/exam.twig

@@ -13,9 +13,9 @@
 {% block main_content %}
 	<h2 class="h2_titleSubject"> {{ Discipline.LocalizedExamType }} </h2>
 
-    {{ HTML.anchor('rate/'~Discipline.ID,
-            "← Перейти к оцениванию",
-            {'title': 'Оценивание', 'class': 'rate_a'})|raw }}
+    {{ HTML.anchor('discipline/' ~ Discipline.ID ~ '/rate', "← Перейти к оцениванию", {
+        'title': 'Оценивание', 'class': 'rate_a'
+    })|raw }}
 
 	<div class="groupSelectorWrap">
 		<div class="groupSelectorText">Фильтр:</div>