storybook/docs/_snippets/angular-add-framework.md

export default {
  // ...
  framework: '@storybook/angular', // 👈 Add this
};

import { StorybookConfig } from '@storybook/angular';

const config: StorybookConfig = {
  // ...
  framework: '@storybook/angular', // 👈 Add this
};

export default config;