🐛 [BUG] - className is missing on <Hero.Description>

[simurai]

Describe the bug

It seems not possible to use a className on the <Hero.Description>.

Reproduction steps

1. Go to https://primer.style/brand/components/Hero/react.
2. Paste following example:

   <Hero className="HeroClass">
     <Hero.Heading className="HeroHeadingClass">Heading</Hero.Heading>
     <Hero.Description className="HeroDescriptionClass">Description</Hero.Description>
   </Hero>

3. Inspect class names with DevTools.
4. Notice how the HeroDescriptionClass is missing on <Hero.Description>.

Expected behavior

HeroDescriptionClass should be applied on <Hero.Description>.

Screenshots

Browsers

Chrome

OS

Mac