chore(deps): update actions/setup-node action to v6

[elastic-renovate-prod]

This PR contains the following updates:

Package	Type	Update	Change
actions/setup-node	action	major	v4 -> v6

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Warning

Some dependencies could not be looked up. Check the Dependency Dashboard for more information.

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Release Notes

actions/setup-node (actions/setup-node)

v6

Compare Source

v5

Compare Source

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Configuration

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[github-actions]

✅MegaLinter analysis: Success

Descriptor	Linter	Files	Fixed	Errors	Warnings	Elapsed time
✅ ACTION	actionlint	1		0	0	0.29s
✅ COPYPASTE	jscpd	yes		no	no	10.44s
✅ REPOSITORY	gitleaks	yes		no	no	59.79s
✅ REPOSITORY	git_diff	yes		no	no	0.43s
✅ REPOSITORY	secretlint	yes		no	no	29.82s
✅ REPOSITORY	trivy	yes		no	no	19.66s
✅ YAML	yamllint	1		0	0	0.74s

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