Step 2: ng test error in repo-table.component.spec.ts

Had to resolve `ng test` error after completing Step 2 in the tutorial.

The tutorial steps do not mention adding:

1. `import { TableModule } from 'carbon-components-angular';` to the file head
2. `imports: [ TableModule ]` to the `TestBed` declaration

These steps should be added to [Build repo page](https://www.carbondesignsystem.com/tutorial/angular/step-2/#build-repo-page) tutorial steps.