chore(deps): update dependency autoprefixer to v9.4.9

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change	References
autoprefixer	devDependencies	patch	9.4.8 -> 9.4.9	source

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Release Notes

postcss/autoprefixer

### [`v9.4.9`](https://togithub.com/postcss/autoprefixer/blob/master/CHANGELOG.md#​949) [Compare Source](https://togithub.com/postcss/autoprefixer/compare/9.4.8...9.4.9) - Fix `grid-template` and `@media` case (by Bogdan Dolin).

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