docs: add vue snapshot section in migration guide (#1265)

docs/guide/migration.md

@@ -38,3 +38,16 @@ From Vitest v0.10.0, the callback style of declaring tests is deprecated. You ca
 - })
 + }))
 ```
+
+**Vue Snapshots**
+
+This is not a Jest specific feature, but if you previously were using Jest with vue-cli preset, you will need to install [`jest-serializer-vue`](https://github.com/eddyerburgh/jest-serializer-vue) package, and use it inside [setupFiles](/config/#setupfiles):
+
+```ts
+import vueSnapshotSerializer from 'jest-serializer-vue'
+
+// Add Snapshot Serializer
+expect.addSnapshotSerializer(vueSnapshotSerializer)
+```
+
+Otherwise your snapshots will have a lot of escaped `"` characters.