docs: use same pattern in examples (#5051)

Author: Paul

docs/guide/mocking.md

@@ -228,7 +228,7 @@ import * as mod from './foobar.js'
 vi.spyOn(mod, 'foo')
 vi.mock('./foobar.js', async (importOriginal) => {
   return {
-    ...await importOriginal(),
+    ...await importOriginal<typeof import('./foobar.js')>(),
     // this will only affect "foo" outside of the original module
     foo: () => 'mocked'
   }
@@ -609,8 +609,8 @@ expect(obj.method).toHaveBeenCalled()
 ```ts
 import { mocked, original } from './some-path.js'
 
-vi.mock('./some-path.js', async () => {
-  const mod = await vi.importActual<typeof import('./some-path.js')>('./some-path.js')
+vi.mock('./some-path.js', async (importOriginal) => {
+  const mod = await importOriginal<typeof import('./some-path.js')>()
   return {
     ...mod,
     mocked: vi.fn()