Set overflow to auto for exercise tips.

Author: Benedikt Artelt

app/views/exercises/_tips_content.html.slim

@@ -5,7 +5,7 @@
   - append_javascript_pack_tag('highlight')
   - append_stylesheet_pack_tag('highlight')
 
-#tips.card.d-block.overflow-scroll role='tab'
+#tips.card.d-block.overflow-auto role='tab'
   .card-header.py-2
     i.fa-solid.fa-lightbulb
     = t('exercises.implement.tips.heading')