Fix "Leave this group" button for subgroups listed in group overview

Fix "Leave this group" button for subgroups listed in group overview.

Changelog: fixed

app/assets/javascripts/groups/components/group_item.vue

@@ -181,7 +181,12 @@ export default {
           <gl-badge variant="warning">{{ __('pending removal') }}</gl-badge>
         </div>
         <div class="metadata d-flex flex-grow-1 flex-shrink-0 flex-wrap justify-content-md-between">
-          <item-actions v-if="isGroup" :group="group" :parent-group="parentGroup" />
+          <item-actions
+            v-if="isGroup"
+            :group="group"
+            :parent-group="parentGroup"
+            :action="action"
+          />
           <item-stats
             :item="group"
             class="group-stats gl-mt-2 d-none d-md-flex gl-align-items-center"