docs: specify Vitest version for test.extend (#3683)

docs/api/index.md

@@ -59,6 +59,7 @@ In Jest, `TestFunction` can also be of type `(done: DoneCallback) => void`. If t
 
 - **Type:** `<T extends Record<string, any>>(fixtures: Fixtures<T>): TestAPI<ExtraContext & T>`
 - **Alias:** `it.extend`
+- **Version:** Vitest 0.32.3
 
   Use `test.extend` to extend the test context with custom fixtures. This will return a new `test` and it's also extendable, so you can compose more fixtures or override existing ones by extending it as you need. See [Extend Test Context](/guide/test-context.html#test-extend) for more information.
 

docs/guide/test-context.md

@@ -35,6 +35,10 @@ Vitest provides two diffident ways to help you extend the test context.
 
 ### `test.extend`
 
+::: warning
+This API is available since Vitest 0.32.3.
+:::
+
 Like [Playwright](https://playwright.dev/docs/api/class-test#test-extend), you can use this method to define your own `test` API with custom fixtures and reuse it anywhere.
 
 For example, we first create `myTest` with two fixtures, `todos` and `archive`.