Update README.md with new onyx logo assets

[mj-hof]

Relates to #

Checklist

• The added / edited code has been documented with JSDoc
• All changes are documented in the documentation app (folder apps/docs)
• If a new component is added, at least one Playwright screenshot test is added
• A changeset is added with npx changeset add if your changes should be released as npm package (because they affect the library usage)

[changeset-bot]

⚠️ No Changeset found

Latest commit: 1eab766

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