feat: remove usage of .sync and define explicitly emits (#10209)

References

- https://v3-migration.vuejs.org/breaking-changes/v-model
-
https://v3-migration.vuejs.org/breaking-changes/v-on-native-modifier-removed.html

app/javascript/portal/components/PublicArticleSearch.vue

@@ -9,6 +9,7 @@ export default {
     PublicSearchInput,
     SearchSuggestions,
   },
+  emits: ['input', 'blur'],
   data() {
     return {
       searchTerm: '',