Simple documentation typo

[thebluejay]

The documentation for the no-jquery rule (docs/rules/no-jquery.md) has a confusing typo, where the second example of correct code for this rule, is actually incorrect.

Currently the example is:

import $ from 'jquery';

export default Component.extend({
  click() {
    document.body.classList.add('expanded');
  }
});

When it should be lacking the jQuery import like so:

export default Component.extend({
  click() {
    document.body.classList.add('expanded');
  }
});

[twokul]

@thebluejay do you mind submitting a quick PR to address the issue?