chore(deps): update dependency postcss to v8.5.6 (#592)

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

Author: renovate[bot]

package.json

@@ -108,7 +108,7 @@
     "jest-environment-jsdom": "29.7.0",
     "lint-staged": "15.5.2",
     "npm-run-all2": "5.0.2",
-    "postcss": "8.5.5",
+    "postcss": "8.5.6",
     "postcss-import": "14.1.0",
     "postcss-loader": "8.1.1",
     "prettier": "3.5.3",