Build(deps-dev): bump postcss from 8.5.16 to 8.5.19

Bumps [postcss](https://github.com/postcss/postcss) from 8.5.16 to 8.5.19.
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](postcss/postcss@8.5.16...8.5.19)

---
updated-dependencies:
- dependency-name: postcss
  dependency-version: 8.5.19
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

package-lock.json

@@ -52,7 +52,7 @@
     "eslint-plugin-react-refresh": "^0.5.3",
     "globals": "^17.7.0",
     "lychee": "^0.2.12",
-    "postcss": "^8.5.16",
+    "postcss": "^8.5.19",
     "postcss-cli": "^11.0.1",
     "tailwindcss": "^4.3.1",
     "typescript": "~6.0.3",