Update styles.css link in Routing tutorial

[tiangolo]

The current link in the Routing tutorial leads to a 404 error.

This update fixes that to point to the correct GitHub "raw" file link. Nevertheless, in the "Quickstart" the link takes to the normal GitHub page, not the "raw" file.

---

Also, it isn't very clear that for relative "asset" loading (html and css files) it's needed to set the moduleId variable in every @Component declaration to module.id. Otherwise the loading fails. (It took me some time to discover that).

As in:

@Component({
  moduleId: module.id,
  selector: 'my-dashboard',
  templateUrl: 'dashboard.component.html',
  styleUrls: ['dashboard.component.css']
})
export class DashboardComponent implements OnInit {

...

Should I try to add that to the guide to make it more clear in another PR?

[googlebot]

Thanks for your pull request. It looks like this may be your first contribution to a Google open source project. Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

📝 Please visit https://cla.developers.google.com/ to sign.

Once you've signed, please reply here (e.g. I signed it!) and we'll verify. Thanks.

---

• If you've already signed a CLA, it's possible we don't have your GitHub username or you're using a different email address. Check your existing CLA data and verify that your email is set on your git commits.
• If you signed the CLA as a corporation, please let us know the company's name.

[googlebot]

Thanks for your pull request. It looks like this may be your first contribution to a Google open source project. Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

📝 Please visit https://cla.developers.google.com/ to sign.

Once you've signed, please reply here (e.g. I signed it!) and we'll verify. Thanks.

---

• If you've already signed a CLA, it's possible we don't have your GitHub username or you're using a different email address. Check your existing CLA data and verify that your email is set on your git commits.
• If you signed the CLA as a corporation, please let us know the company's name.

[tiangolo]

I signed it!

[googlebot]

CLAs look good, thanks!

[googlebot]

CLAs look good, thanks!

[Foxandxss]

Thanks. The moduleId is being fixed in a different PR.

[tiangolo]

Thanks! That was a fast merge 🎉 !

And thanks for the clarification about the moduleId.