Fixing design-system.schema.json schema placeholder content

[GarthDB]

It looks like the open-ui/site/src/schemas/design-system.schema.json file has some placeholder data hanging out.

{
  "$id": "https://example.com/address.schema.json",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "description": "An address similar to http://microformats.org/wiki/h-card",

I took the description from the definition on the openui website.

[gregwhitworth]

@GarthDB can you please join the Open UI CG to meet the IPR requirements?

[GarthDB]

@gregwhitworth I've started the process, but I have to get someone to approve it at Adobe before I can join the group.

[GarthDB]

@gregwhitworth I believe it's worked out now. I believe I officially joined.

[GarthDB]

Looks like my pr has been deemed acceptable :) I feel accepted.