Update dependency node-red to v2.1.6

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
node-red (source)	2.1.5 -> 2.1.6

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Release Notes

node-red/node-red

### [`v2.1.6`](https://togithub.com/node-red/node-red/blob/HEAD/CHANGELOG.md#​216-Maintenance-Release) [Compare Source](https://togithub.com/node-red/node-red/compare/2.1.5...2.1.6) Editor - Revert copy-text change and apply alternative fix ([#​3363](https://togithub.com/node-red/node-red/issues/3363)) [@​knolleary](https://togithub.com/knolleary) - Update marked to latest ([#​3362](https://togithub.com/node-red/node-red/issues/3362)) [@​knolleary](https://togithub.com/knolleary) - fix to make start of property error tooltip messages aligned ([#​3358](https://togithub.com/node-red/node-red/issues/3358)) [@​HiroyasuNishiyama](https://togithub.com/HiroyasuNishiyama) Nodes - Inject: fix JSON propety validation of inject node ([#​3349](https://togithub.com/node-red/node-red/issues/3349)) [@​HiroyasuNishiyama](https://togithub.com/HiroyasuNishiyama) - Delay: fix unit value validation of delay node ([#​3351](https://togithub.com/node-red/node-red/issues/3351)) [@​HiroyasuNishiyama](https://togithub.com/HiroyasuNishiyama)

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