build(deps): Bump postcss in the npm-production group

Bumps the npm-production group with 1 update: [postcss](https://github.com/postcss/postcss).


Updates `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:production
  update-type: version-update:semver-patch
  dependency-group: npm-production
...

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

Author: dependabot[bot]

package-lock.json

@@ -8,7 +8,7 @@
     "@tailwindcss/postcss": "^4.1.18",
     "@tailwindcss/vite": "^4.1.18",
     "framer-motion": "^12.23.9",
-    "postcss": "^8.5.6",
+    "postcss": "^8.5.8",
     "react": "^19.1.0",
     "react-dom": "^19.1.0",
     "tailwindcss": "^4.1.5",