fix(deps): update dependency @netlify/cache-utils to v6

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
@netlify/cache-utils (source)	^5.1.5 → ^6.0.4

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Release Notes

netlify/build (@​netlify/cache-utils)

v6.0.4

Compare Source

Bug Fixes

• remove path-exists (cache-utils) (#​6600) (2ea5a35)
• remove code supporting versions of Node < v15 (#​6599) (d9f55d3)

v6.0.3

Compare Source

Bug Fixes

• upgrade @​types/node to v18 (#​6400) (efcc052)

v6.0.2

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Bug Fixes

• deps: update dependency get-stream to v9 (#​6352) (f39bf0c)
• deps: update dependency globby to v14 (#​6363) (0f00451)
• deps: update dependency readdirp to v4 (#​6335) (bbc39d2)

v6.0.1

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Bug Fixes

• deps: update dependency cpy to v11 (#​6324) (9b106e6)

v6.0.0

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⚠ BREAKING CHANGES

• end of support for v14 and v16 (#​6223)

Features

• end of support for v14 and v16 (#​6223) (9917ef4)

v5.2.0

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Features

• add node 22 to supported versions list (#​5917) (5455393)

v5.1.6

Compare Source

Bug Fixes

• missing type-def (#​5786) (4433cc3)

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