chore(deps): update yarn to v4.9.4 (spectrum-two)

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
yarn (source)	4.9.3 -> 4.9.4

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Release Notes

yarnpkg/berry (yarn)

v4.9.4

Compare Source

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Configuration

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Latest commit: 16ad403

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[github-actions]

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PR #4162 has been deployed to Azure Blob Storage: https://spectrumcss.z13.web.core.windows.net/pr-4162/index.html.

[github-actions]

File metrics

Summary

Total size: 1.43 MB^*

🎉 No changes detected in any packages

* Size is the sum of all main files for packages in the library.
* An ASCII character in UTF-8 is 8 bits or 1 byte.

[castastrophe]

Pulled this down and validated a set of our core commands. No regressions identified.