fix(deps): update dependency @netlify/build to ^27.20.1

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@netlify/build	^27.20.0 -> ^27.20.1

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[github-actions]

📊 Benchmark results

Comparing with 254b7c0

Package size: 224 MB

(no change)

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