chore(deps): update dependency postcss to ^8.5.8

Author: renovate[bot]

lit-minimal/package.json

@@ -16,7 +16,7 @@
     "@egoist/tailwindcss-icons": "^1.9.0",
     "@iconify-json/lucide": "^1.2.98",
     "@tailwindcss/vite": "^4.2.2",
-    "postcss": "^8.5.0",
+    "postcss": "^8.5.8",
     "tailwindcss": "^4.2.2",
     "tw-animate-css": "^1.4.0",
     "typescript": "^5.9.0",