fix(deps): update dependency @netlify/build to ^27.20.6

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@netlify/build	^27.20.4 -> ^27.20.6

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Release Notes

netlify/build

v27.20.6

Compare Source

v27.20.5

Compare Source

Bug Fixes

• migrate build package to Typescript (#​4565) (8e26956)
• move js-client to mono repository and add types (#​4592) (7b7c926)

Dependencies

• The following workspace dependencies were updated
  • dependencies
    • @​netlify/config bumped from ^18.2.4 to ^18.2.5
    • @​netlify/git-utils bumped from ^4.1.3 to ^4.1.4

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Configuration

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

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• If you want to rebase/retry this PR, click this checkbox.

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[github-actions]

📊 Benchmark results

Comparing with bea2c83

Package size: 230 MB

⬆️ 1.20% increase vs. bea2c83

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• T (current commit): 230 MB