Update dependency express to v4.21.1

Author: dev-mend-for-github-com[bot]

package.json

@@ -26,7 +26,7 @@
     "compression": "1.7.1",
     "cookies": "^0.7.0",
     "cors": "^2.8.3",
-    "express": "4.17.3",
+    "express": "4.21.1",
     "global": "^4.3.2",
     "handlebars": "4.6.0",
     "http-errors": "^1.8.0",