Update dependency typescript to v6

Author: renovate[bot]

package.json

@@ -15,6 +15,6 @@
     "@types/react": "^19.0.1",
     "@types/react-dom": "^19.0.1",
     "react-email": "6.0.0",
-    "typescript": "^5.9.3"
+    "typescript": "^6.0.0"
   }
 }