fix(deps): update netlify packages

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@netlify/build (source)	29.47.1 -> 29.47.2
@netlify/config (source)	20.15.1 -> 20.15.2

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Release Notes

netlify/build (@​netlify/build)

v29.47.2

Compare Source

Dependencies

• The following workspace dependencies were updated
  • dependencies
    • @​netlify/config bumped from ^20.15.1 to ^20.15.2

netlify/build (@​netlify/config)

v20.15.2

Compare Source

Bug Fixes

• re-add siteFeatureFlagPrefix (#​5709) (055e9a7)

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Configuration

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📊 Benchmark results

Comparing with 754a94e

• Dependency count: 1,308 (no change)
• Package size: 437 MB (no change)
• Number of ts-expect-error directives: 978 (no change)