MDL-86133 courseformat: Update overview buttons style

public/mod/forum/classes/courseformat/overview.php

@@ -141,7 +141,7 @@ class overview extends \core_courseformat\activityoverviewbase {
         $content = new action_link(
             url: new url('/mod/forum/view.php', ['id' => $this->cm->id]),
             text: $totalreplies .' ' . $badge,
-            attributes: ['class' => button::SECONDARY_OUTLINE->classes()],
+            attributes: ['class' => button::BODY_OUTLINE->classes()],
         );
 
         return new overviewitem(

public/mod/wiki/classes/courseformat/overview.php

@@ -77,7 +77,7 @@ class overview extends \core_courseformat\activityoverviewbase {
         $content = new action_link(
             url: $url,
             text: $text,
-            attributes: ['class' => button::SECONDARY_OUTLINE->classes()],
+            attributes: ['class' => button::BODY_OUTLINE->classes()],
         );
 
         return new overviewitem(