Finalize accordion block styles

[knice]

We need to better distinguish between summary and the rest of the content in the details element.

• [x] Some indentation in the content that comes after summary
• [x] Typographic distinction between summary and the rest of the content

[teresasilva71]

@Herm71 @knice In our open lab today, this was brought up as a request again. Asking for status of this.

[knice]

Styles for the accordion block will go live with the 12/14 release of the theme.