Bump postcss from 8.5.6 to 8.5.8 in /packages/hyde

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](postcss/postcss@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>

Author: dependabot[bot]

packages/hyde/package-lock.json

@@ -11,7 +11,7 @@
         "autoprefixer": "^10.4.27",
         "hyde-vite-plugin": "^1.1.0",
         "hydefront": "^4.0.0",
-        "postcss": "^8.5.6",
+        "postcss": "^8.5.8",
         "tailwindcss": "^4.1.18",
         "vite": "^7.3.1"
     }