chore(deps-dev): bump postcss from 8.5.6 to 8.5.8

Bumps [postcss](https://github.com/postcss/postcss) from 8.5.6 to 8.5.8.
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](https://github.com/postcss/postcss/compare/8.5.6...8.5.8)

---
updated-dependencies:
- dependency-name: postcss
  dependency-version: 8.5.8
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

storybook/package.json

@@ -36,7 +36,7 @@
     "cross-env": "10.1.0",
     "eslint-plugin-storybook": "10.2.14",
     "eslint-plugin-svelte": "^3.15.0",
-    "postcss": "^8.5.6",
+    "postcss": "^8.5.8",
     "postcss-load-config": "^6.0.1",
     "react": "18.2.0",
     "react-dom": "18.3.1",

website/package.json

@@ -51,7 +51,7 @@
     "markdownlint-cli2": "^0.21.0",
     "markdownlint-cli2-formatter-summarize": "^0.0.8",
     "msw": "^2.12.10",
-    "postcss": "^8.5.6",
+    "postcss": "^8.5.8",
     "tailwindcss": "^4.2.1",
     "typedoc": "^0.28.17",
     "typedoc-plugin-markdown": "^4.10.0",