Update dependency node to v21.6.1

[balena-renovate[bot]]

This PR contains the following updates:

Package	Update	Change
node (source)	patch	21.6.0 -> 21.6.1

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Release Notes

nodejs/node (node)

### [`v21.6.1`](https://togithub.com/nodejs/node/releases/tag/v21.6.1): 2024-01-22, Version 21.6.1 (Current), @​RafaelGSS [Compare Source](https://togithub.com/nodejs/node/compare/v21.6.0...v21.6.1) ##### Notable Changes This release fixes a bug in `undici` using WebStreams ##### Commits - \[[`662ac95729`](https://togithub.com/nodejs/node/commit/662ac95729)] - ***Revert*** "**stream**: fix cloned webstreams not being unref'd" (Matteo Collina) [#​51491](https://togithub.com/nodejs/node/pull/51491) - \[[`1b8bba8aee`](https://togithub.com/nodejs/node/commit/1b8bba8aee)] - **test**: add regression test for 51586 (Matteo Collina) [#​51491](https://togithub.com/nodejs/node/pull/51491)

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