Refactor exam take help template for improved readability and structure

sbas/templates/sbas/exam_take_help.html

@@ -1,5 +1,5 @@
 
-    <details class="help-text pt-3">
+<details class="help-text pt-3">
     <summary><i class="bi bi-info-circle"></i> Help</summary>
     <p>Each question contains a list of 5 different statements. One of these is the single BEST answer.</p>
     <p>Click on the correct statement to select it. Once selected it will be highlighted. </p>
@@ -10,4 +10,4 @@
         {% url 'sbas:exam_scores_user' pk=exam.pk as scores_url %}
     {% endif %}
     <p>Results are also available on the results page <a target="_blank" href="{{ scores_url }}">here</a>.</p>
-    </details>
+</details>