Update dependency postcss-cli to v11

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
postcss-cli	^10.0.0 -> ^11.0.0

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Release Notes

postcss/postcss-cli (postcss-cli)

### [`v11.0.0`](https://togithub.com/postcss/postcss-cli/blob/HEAD/CHANGELOG.md#1100--2023-12-05) [Compare Source](https://togithub.com/postcss/postcss-cli/compare/10.1.0...11.0.0) - **BREAKING:** Require Node.js v18+ ([#​464](https://togithub.com/postcss/postcss-cli/pull/464)) - Upgrade to [`postcss-load-config@5`](https://togithub.com/postcss/postcss-load-config/blob/main/CHANGELOG.md#50-2023-11-20) for improved ESM & TS config support ([#​461](https://togithub.com/postcss/postcss-cli/issues/461), [#​462](https://togithub.com/postcss/postcss-cli/pull/462))

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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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