fix(deps): update dependency @netlify/config to v20

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@netlify/config	^19.1.2 -> ^20.0.0

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Release Notes

netlify/build

v20.0.0

Compare Source

⚠ BREAKING CHANGES

• add cache config property to edge functions (#​4686)

Features

• add cache config property to edge functions (#​4686) (fecf2a1)

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[github-actions]

📊 Benchmark results

Comparing with f2b6f84

Package size: 247 MB

⬇️ 0.16% decrease vs. f2b6f84

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• T (current commit): 247 MB