chore: 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

@@ -87,7 +87,7 @@
     "eslint-plugin-react": "^7.37.5",
     "husky": "^9.1.7",
     "lint-staged": "^17.0.8",
-    "postcss": "^8.5.16",
+    "postcss": "^8.5.19",
     "prettier": "^3.9.4",
     "prettier-plugin-tailwindcss": "^0.6.14",
     "tailwindcss": "^4.3.2",