update: generators package tests

npm/ng-packs/packages/generators/src/generators/change-theme/generator.spec.ts

@@ -1,11 +1,11 @@
 import { createTreeWithEmptyWorkspace } from '@nx/devkit/testing';
-import { Tree, readProjectConfiguration } from '@nx/devkit';
+import { Tree } from '@nx/devkit';
 
 import { changeThemeGenerator } from './generator';
 import { ChangeThemeGeneratorSchema } from './schema';
 
-jest.mock('@nx/devkit/ngcli-adapter', () => ({
-  wrapAngularDevkitSchematic: jest.fn(() => jest.fn()),
+vi.mock('@nx/devkit/ngcli-adapter', () => ({
+  wrapAngularDevkitSchematic: vi.fn(() => vi.fn()),
 }));
 
 describe('change-theme generator', () => {