chore: bump up Yarn to v4.8.1 (#399)

This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [yarn](https://redirect.github.com/yarnpkg/berry) ([source](https://redirect.github.com/yarnpkg/berry/tree/HEAD/packages/yarnpkg-cli)) | [`4.8.0` -> `4.8.1`](https://renovatebot.com/diffs/npm/yarn/4.8.0/4.8.1) | [![age](https://developer.mend.io/api/mc/badges/age/npm/@yarnpkg%2fcli/4.8.1?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://developer.mend.io/api/mc/badges/adoption/npm/@yarnpkg%2fcli/4.8.1?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://developer.mend.io/api/mc/badges/compatibility/npm/@yarnpkg%2fcli/4.8.0/4.8.1?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/@yarnpkg%2fcli/4.8.0/4.8.1?slim=true)](https://docs.renovatebot.com/merge-confidence/) |

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### Release Notes

<details>
<summary>yarnpkg/berry (yarn)</summary>

### [`v4.8.1`](https://redirect.github.com/yarnpkg/berry/compare/260cff1745bdf2d71ed91f76e440330078896e1b...76596c5d3fb9a60fa1459b6a1d62df4cfa4c5701)

[Compare Source](https://redirect.github.com/yarnpkg/berry/compare/260cff1745bdf2d71ed91f76e440330078896e1b...76596c5d3fb9a60fa1459b6a1d62df4cfa4c5701)

</details>

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### Configuration

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♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update again.

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Author: renovate[bot]