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/dashboard/components/widgets/conversation/ReplyEmailHead.vue

@@ -17,6 +17,7 @@ export default {
       default: '',
     },
   },
+  emits: ['update:bccEmails', 'update:ccEmails', 'update:toEmails'],
   setup() {
     return { v$: useVuelidate() };
   },