Add lazy loading example in Cheat Sheet

To be reviewed (for docs) and discussed. Which way should we go @Chi?

Core does the same:
'#attributes' => ['loading' => 'lazy'],
https://git.drupalcode.org/project/drupal/-/commit/f8eb47e#f8dc85135034c...

So this is the right way via the attributes array. Still fixes from 🐛 drupal_image() needs #width / #height values for fully working image cache scale, lazy-loading and img attributes RTBC are needed for correct image size reservation.

Confirming this is the right way to do it. Definitely helpful to have this in the documentation examples.

Thank you.

Thank YOU @Chi :)

Automatically closed - issue fixed for 2 weeks with no activity.