Update dependency @release-it-plugins/workspaces to v4

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@release-it-plugins/workspaces	3.2.0 -> 4.0.0

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Release Notes

release-it-plugins/workspaces (@​release-it-plugins/workspaces)

### [`v4.0.0`](https://togithub.com/release-it-plugins/workspaces/blob/HEAD/CHANGELOG.md#v400-2023-07-11) [Compare Source](https://togithub.com/release-it-plugins/workspaces/compare/v3.2.0...v4.0.0) ##### :boom: Breaking Change - [#​106](https://togithub.com/release-it-plugins/workspaces/pull/106) Upgrades release-it to 16.x. Upgrades node to 16.x ([@​scalvert](https://togithub.com/scalvert)) ##### :rocket: Enhancement - [#​88](https://togithub.com/release-it-plugins/workspaces/pull/88) Avoid warning about private packages ([@​rwjblue](https://togithub.com/rwjblue)) ##### :house: Internal - [#​107](https://togithub.com/release-it-plugins/workspaces/pull/107) Convert to vitest ([@​scalvert](https://togithub.com/scalvert)) - [#​90](https://togithub.com/release-it-plugins/workspaces/pull/90) Add `release-it@^15.0.0` (latest 15.x) to CI ([@​rwjblue](https://togithub.com/rwjblue)) - [#​89](https://togithub.com/release-it-plugins/workspaces/pull/89) Add Node 18 to CI ([@​rwjblue](https://togithub.com/rwjblue)) ##### Committers: 2 - Robert Jackson ([@​rwjblue](https://togithub.com/rwjblue)) - Steve Calvert ([@​scalvert](https://togithub.com/scalvert))

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