fix(deps): update dependency @netlify/build to ^27.8.1

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@netlify/build	^27.7.0 -> ^27.8.1

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[github-actions]

📊 Benchmark results

Comparing with 61ba1ef

Package size: 230 MB

⬇️ 0.13% decrease vs. 61ba1ef

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• T (current commit): 230 MB