fix(deps): update dependency @netlify/build to ^28.4.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@netlify/build	^28.3.1 -> ^28.4.0

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Release Notes

netlify/build

v28.4.0

Compare Source

Features

• warn on minimum required node version for plugins (#​4717) (84c545b)

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Configuration

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[github-actions]

📊 Benchmark results

Comparing with 21fb6a1

Package size: 249 MB

⬆️ 0.01% increase vs. 21fb6a1

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• T-30 (f2b6f84): 248 MB
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• T-9 (ac95cb0): 256 MB
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• T-2 (0a1a6ee): 249 MB
• T-1 (21fb6a1): 249 MB
• T (current commit): 249 MB