`CSSHelp.getStyle()` may be too strict

### Describe the bug

The method `CSSHelp.getStyle()` tests for an exact class name match. If the tested css selector contains the expected class plus the element tag, the test that uses `CSSHelp.getStyle()` fails. An example of this uses Test 13 at https://www.freecodecamp.org/learn/full-stack-developer/lab-blog-post-card/lab-blog-post-card

```css
.read-more:hover{background: yellow;} /* passes test */
```

```css
a.read-more:hover{background: yellow;} /* fails */
```

### To Reproduce

1. Go to https://www.freecodecamp.org/learn/full-stack-developer/lab-blog-post-card/lab-blog-post-card
2. Use sample html / css:

```html

Read More

```

```css
a.read-more:hover {
background: yellow;
}
```

3. See test 13 fail (it passes with the sample code if the `a` is removed from the selector.

### Expected behavior

I would have liked to see my test pass even with the `a` present in the selector, as this aligns with the spirit of what was being tested.

### Screenshots

### Additional context

I was advised in discord to raise the issue to discuss it here. I'm not sure if changing the strict equality test for `.includes()` is advisable, as I cannot guarantee this won't introduce more issues with respect to other lab tests.

### Alternative approach

Instead of altering `CSSHelp.getStyle()`, we could add to the Get Help button a sort of FAQ that include advice such as:

> If tests are not passing, you should ensure your CSS selectors match verbatim the way the selectors are defined in the tests.

I'm not sure if this already exists.