fix(deps): update dependency express to ~4.21.0

Author: renovate[bot]

bun.lockb

@@ -26,7 +26,7 @@
     "@nestjs/platform-express": "^10.3.9",
     "@nx/angular": "19.3.2",
     "axios": "^1.7.2",
-    "express": "~4.19.2",
+    "express": "~4.21.0",
     "ngxtension": "^3.5.5",
     "reflect-metadata": "^0.2.2",
     "rxjs": "~7.8.1",