fix(deps): update dependency postcss-load-config to v6

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
postcss-load-config	5.1.0 -> 6.0.1

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Release Notes

postcss/postcss-load-config (postcss-load-config)

### [`v6.0.1`](https://togithub.com/postcss/postcss-load-config/blob/HEAD/CHANGELOG.md#601-2024-06-02) [Compare Source](https://togithub.com/postcss/postcss-load-config/compare/6.0.0...6.0.1) ##### Bug Fixes - Fixed bundlers support ([#​262](https://togithub.com/postcss/postcss-load-config/pull/262)) ### [`v6.0.0`](https://togithub.com/postcss/postcss-load-config/compare/5.1.0...4be6dcff44bb0269c96d5b947d4daae59a0cfbb5) [Compare Source](https://togithub.com/postcss/postcss-load-config/compare/5.1.0...6.0.0)

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