chore(deps-dev): bump postcss from 8.5.10 to 8.5.12

Bumps [postcss](https://github.com/postcss/postcss) from 8.5.10 to 8.5.12.
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](postcss/postcss@8.5.10...8.5.12)

---
updated-dependencies:
- dependency-name: postcss
  dependency-version: 8.5.12
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

packages/frontend/package.json

@@ -36,7 +36,7 @@
     "@typescript-eslint/eslint-plugin": "8.59.0",
     "jsdom": "^29.0.2",
     "monaco-editor": "^0.55.1",
-    "postcss": "^8.5.10",
+    "postcss": "^8.5.12",
     "postcss-load-config": "^6.0.1",
     "svelte": "5.55.5",
     "svelte-fa": "^4.0.4",