chore(deps): update dependency shiki to v4

Author: renovate[bot]

package.json

@@ -46,7 +46,7 @@
     "pg": "^8.19.0",
     "reka-ui": "^2.9.0",
     "shadcn-nuxt": "^2.4.3",
-    "shiki": "^3.23.0",
+    "shiki": "^4.0.2",
     "shiki-stream": "^0.1.4",
     "striptags": "3.2.0",
     "tailwind-merge": "^3.5.0",