[docs][bug] `<rh-card>` pattern page demos

[marionnegp]

Description

Some of the card pattern demos are resizing oddly at larger screen sizes (1505px or wider for me). I'm seeing it for:

• Asset cards (all of them)
• Avatars card
• Icon card
• Image card
• List cards (all of them)
• Logo card (Text and CTA only)
• Title bar card
• Quote cards (all of them)

(Phew.)

Screenshots

Steps to reproduce

View examples on live card pattern page

Expected behaviour

Cards should not be that narrow.

Operating System (OS)

macOS

Browser

Chrome

Additional browser or assistive technology info

No response

[bennypowers]

See also #1779

[bennypowers]

I'd like to take this over