Replace slot syntax for Vue 3 migration

app/assets/javascripts/boards/components/board_form.vue

@@ -177,7 +177,7 @@ export default {
     @cancel="cancel"
     @submit="submit"
   >
-    <template slot="body">
+    <template #body>
       <p v-if="isDeleteForm">{{ __('Are you sure you want to delete this board?') }}</p>
       <form v-else class="js-board-config-modal" @submit.prevent>
         <div v-if="!readonly" class="append-bottom-20">

changelogs/unreleased/replace-slot-for-vue-3-migration.yml

+---
+title: Replace slot syntax for Vue 3 migration
+merge_request: 31987
+author: gaslan
+type: other