chore(deps-dev): bump postcss

Bumps the npm_and_yarn group with 1 update in the /frontend directory: [postcss](https://github.com/postcss/postcss).


Updates `postcss` from 8.5.8 to 8.5.12
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](https://github.com/postcss/postcss/compare/8.5.8...8.5.12)

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

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

frontend/package-lock.json

@@ -60,7 +60,7 @@
         "eslint-plugin-unused-imports": "^4.1.4",
         "husky": "^9.1.7",
         "lint-staged": "^16.4.0",
-        "postcss": "^8.4.49",
+        "postcss": "^8.5.12",
         "prettier": "^3.5.3",
         "prettier-plugin-tailwindcss": "^0.7.2",
         "tailwindcss": "^4.2.2",
@@ -9951,9 +9951,9 @@
       }
     },
     "node_modules/postcss": {
-      "version": "8.5.8",
-      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.5.8.tgz",
-      "integrity": "sha512-OW/rX8O/jXnm82Ey1k44pObPtdblfiuWnrd8X7GJ7emImCOstunGbXUpp7HdBrFQX6rJzn3sPT397Wp5aCwCHg==",
+      "version": "8.5.12",
+      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.5.12.tgz",
+      "integrity": "sha512-W62t/Se6rA0Az3DfCL0AqJwXuKwBeYg6nOaIgzP+xZ7N5BFCI7DYi1qs6ygUYT6rvfi6t9k65UMLJC+PHZpDAA==",
       "dev": true,
       "funding": [
         {

frontend/package.json

@@ -71,7 +71,7 @@
     "eslint-plugin-unused-imports": "^4.1.4",
     "husky": "^9.1.7",
     "lint-staged": "^16.4.0",
-    "postcss": "^8.4.49",
+    "postcss": "^8.5.12",
     "prettier": "^3.5.3",
     "prettier-plugin-tailwindcss": "^0.7.2",
     "tailwindcss": "^4.2.2",