Update dependency postcss to v8.5.0 (#497)

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

Author: renovate[bot]

package-lock.json

@@ -61,7 +61,7 @@
     "eslint": "8.57.1",
     "eslint-config-stylelint": "21.0.0",
     "npm-run-all2": "6.2.6",
-    "postcss": "8.4.49",
+    "postcss": "8.5.0",
     "prettier": "3.4.2",
     "remark-cli": "12.0.1",
     "stylelint": "16.13.1"