docs: findAll().at() migration notes

docs/api/index.md

@@ -1056,12 +1056,13 @@ findAll(selector: string): DOMWrapper<Element>[]
 
 ```js
 import { mount } from '@vue/test-utils'
-import Component from './Component.vue'
+import BaseTable from './BaseTable.vue'
 
 test('findAll', () => {
-  const wrapper = mount(Component)
+  const wrapper = mount(BaseTable);
 
-  wrapper.findAll('[data-test="number"]') //=> found; returns array of DOMWrapper
+  // .findAll() returns an array of DOMWrappers
+  const thirdRow = wrapper.findAll('tr')[2];
 })
 ```
 

docs/migration/index.md

@@ -216,3 +216,19 @@ Vue 3 renamed the `vm.$destroy` to `vm.$unmount`. Vue Test Utils has followed su
 ### `scopedSlots` is now merged with `slots`
 
 Vue 3 united the `slot` and `scoped-slot` syntax under a single syntax, `v-slot`, which you can read about in the [the docs](https://v3.vuejs.org/guide/migration/slots-unification.html#overview). Since `slot` and `scoped-slot` are now merged, the `scopedSlots` mounting option is now deprecated - just use the `slots` mounting option for everything.
+
+### `findAll().at()` removed
+
+`findAll()` now returns an array of DOMWrappers.
+
+**Before:**
+
+```js
+wrapper.findAll('[data-test="token"]').at(0);
+```
+
+**After:**
+
+```js
+wrapper.findAll('[data-test="token"]')[0];
+```