Remove the use of jQuery in guides-article

[mansona]

in the old guides-app there was a WIP PR to remove the use of jQuery in the guides-article https://github.com/ember-learn/guides-app/pull/242

Todo

• [ ] investigate if this work is still needed (i.e. check if it has already been done)
• [ ] re-implement the work removing jQuery

[jbryson3]

This appears to be already done with https://github.com/ember-learn/guidemaker-ember-template/commit/b3f88ebe0b79f3c97d019598ad193c7344013a1d

[IgnaceMaes]

Looks like this was implemented, indeed!