chore(deps): update dependency postcss to v8.5.12 (#754)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

package-lock.json

@@ -50,7 +50,7 @@
     "jest": "30.3.0",
     "jest-environment-jsdom": "30.3.0",
     "node-watch": "0.7.4",
-    "postcss": "8.5.10",
+    "postcss": "8.5.12",
     "postcss-import": "16.1.1",
     "prettier": "3.8.3",
     "prettier-plugin-multiline-arrays": "4.1.5",