feat(additional-info): Add v13 changes guide (#680)

Author: monbrey

guide/.vuepress/sidebar.ts

@@ -132,6 +132,7 @@ export default {
 				'/additional-info/collections.md',
 				'/additional-info/async-await.md',
 				'/additional-info/rest-api.md',
+				'/additional-info/changes-in-v13.md',
 			],
 		},
 	],