Update dependency postcss to ^8.4.29

Author: renovate[bot]

package.json

@@ -18,7 +18,7 @@
     "autoprefixer": "^10.4.15",
     "nuxt": "^3.7.0",
     "nuxt-icon": "^0.5.0",
-    "postcss": "^8.4.28",
+    "postcss": "^8.4.29",
     "prettier": "^3.0.2",
     "tailwindcss": "^3.3.3"
   },