chore(deps): update dependency postcss to v8.4.39

Author: renovate[bot]

package.json

@@ -36,7 +36,7 @@
     "husky": "9.0.11",
     "jsdom": "24.1.0",
     "lint-staged": "15.2.7",
-    "postcss": "8.4.38",
+    "postcss": "8.4.39",
     "prettier": "3.3.2",
     "tailwindcss": "3.4.4",
     "typescript": "5.5.2",