chore(deps): update dependency cssnano to v6.0.4

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
cssnano	6.0.3 -> 6.0.4

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Release Notes

cssnano/cssnano (cssnano)

### [`v6.0.4`](https://togithub.com/cssnano/cssnano/compare/cssnano-preset-advanced@6.0.3...cssnano-preset-advanced@6.0.4) [Compare Source](https://togithub.com/cssnano/cssnano/compare/cssnano@6.0.3...cssnano@6.0.4)

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Configuration

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🚦 Automerge: Enabled.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

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• [ ] If you want to rebase/retry this PR, check this box

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[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 95.48%. Comparing base (e2008b7) to head (cfe0484).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #2142 +/- ## ======================================= Coverage 95.48% 95.48% ======================================= Files 18 18 Lines 1461 1461 ======================================= Hits 1395 1395 Misses 66 66 ```

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