build(deps): update dependency netlify-cli to v6.8.1

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
netlify-cli	6.8.0 -> 6.8.1

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Release Notes

netlify/cli

### [`v6.8.1`](https://togithub.com/netlify/cli/blob/master/CHANGELOG.md#​681-httpswwwgithubcomnetlifyclicomparev680v681-2021-08-31) [Compare Source](https://togithub.com/netlify/cli/compare/v6.8.0...v6.8.1)

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