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

[red-hat-konflux]

This PR contains the following updates:

Package	Type	Update	Change
actions/setup-node	action	major	v3 → v6

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Release Notes

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

v6

Compare Source

v5

Compare Source

v4

Compare Source

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Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

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Documentation

Find out how to configure dependency updates in MintMaker documentation or see all available configuration options in Renovate documentation.

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✨ Finishing Touches

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• Commit unit tests in branch konflux/mintmaker/security-compliance/actions-setup-node-6.x

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