Update dependency node to v21.7.0

[balena-renovate[bot]]

This PR contains the following updates:

Package	Update	Change
node (source)	minor	21.6.2 -> 21.7.0

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Release Notes

nodejs/node (node)

### [`v21.7.0`](https://togithub.com/nodejs/node/compare/v21.6.2...v21.7.0) [Compare Source](https://togithub.com/nodejs/node/compare/v21.6.2...v21.7.0)

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Configuration

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