chore(deps): update dependency express to ^4.21.0

Author: renovate[bot]

examples/express-plugin/package.json

@@ -8,7 +8,7 @@
   "devDependencies": {
     "@rslib/core": "workspace:*",
     "@types/express": "^4.17.21",
-    "express": "^4.19.2",
+    "express": "^4.21.0",
     "typescript": "^5.5.4"
   },
   "peerDependencies": {