chore(deps): update dependency express to v4.21.0

Author: renovate[bot]

package-lock.json

@@ -37,7 +37,7 @@
     "apollo-server-express": "3.13.0",
     "@apollo/server": "4.9.5",
     "coveralls": "3.1.1",
-    "express": "4.20.0",
+    "express": "4.21.0",
     "graphql": "16.6.0",
     "mocha": "10.7.3",
     "nyc": "15.1.0",