chore(deps): update dependency @vscode/test-electron to v2.3.8

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@vscode/test-electron	2.3.6 -> 2.3.8

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Release Notes

Microsoft/vscode-test (@​vscode/test-electron)

### [`v2.3.7`](https://togithub.com/Microsoft/vscode-test/blob/HEAD/CHANGELOG.md#237--2022-11-23) [Compare Source](https://togithub.com/Microsoft/vscode-test/compare/v2.3.6...v2.3.7) - Remove detection for unsupported win32 builds - Add length and hash validation for downloaded builds

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