Update dependency postcss to v8.5.8 (#1514)

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

Author: renovate[bot]

apps/app/package.json

@@ -81,7 +81,7 @@
     "@types/react": "18.3.28",
     "@types/uuid": "3.4.13",
     "metro-react-native-babel-preset": "0.77.0",
-    "postcss": "8.5.6",
+    "postcss": "8.5.8",
     "tailwindcss": "3.4.1",
     "typescript": "5.9.2"
   },

apps/web/package.json

@@ -86,7 +86,7 @@
     "@types/react-dom": "18.3.7",
     "cssnano": "6.1.2",
     "dotenv-cli": "7.4.4",
-    "postcss": "8.5.6",
+    "postcss": "8.5.8",
     "remix-flat-routes": "0.8.5",
     "tailwindcss": "3.4.1",
     "typescript": "5.9.2"