Add changeset

Author: dchyun

.changeset/seven-eyes-whisper.md

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+"@hashicorp/design-system-components": patch
+---
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+`Accordion` - Set `aria-controls` of `Accordion::Item::Button` to `contentId` from `DisclosurePrimitve` for a11y improvements with toggled content
+`DisclosurePrimitve` - Changed DOM structure of content section and exposed `contentId` for a11y improvements with toggled content
+`Reveal` - Set `aria-controls` of `Reveal::Toggle` to `contentId` from `DisclosurePrimitve` for a11y improvements with toggled content