Update actions/setup-node action to v7

[microbit-renovate]

This PR contains the following updates:

Package	Type	Update	Change
actions/setup-node	action	major	v6 → v7

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Release Notes

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

v7.0.0

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What's Changed

Enhancements:

• Add cache-primary-key and cache-matched-key as outputs by @​gowridurgad in #​1577
• Migrate to ESM and upgrade dependencies by @​gowridurgad in #​1574

Bug fixes:

• Remove dummy NODE_AUTH_TOKEN export by @​gowridurgad in #​1558
• Only use mirrorToken in getManifest if it's provided by @​deiga in #​1548

Documentation updates:

• Add documentation for publishing to npm with Trusted Publisher (OIDC) by @​chiranjib-swain in #​1536
• docs: Update restore-only cache documentation by @​priya-kinthali in #​1550
• docs: Update caching recommendations to mitigate cache poisoning risks by @​chiranjib-swain in #​1567

Dependency update:

• Upgrade @​actions/cache to 5.1.0, log cache write denied by @​jasongin in #​1569

New Contributors

• @​chiranjib-swain made their first contribution in #​1536
• @​deiga made their first contribution in #​1548
• @​jasongin made their first contribution in #​1569

Full Changelog: actions/setup-node@v6...v7.0.0

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Preview build will be at
https://review-python-editor-v3.microbit.org/renovate-actions-setup-node-7-x/