fix: package.json & package-lock.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-BODYPARSER-7926860
- https://snyk.io/vuln/SNYK-JS-EXPRESS-7926867
- https://snyk.io/vuln/SNYK-JS-SEND-7926862
- https://snyk.io/vuln/SNYK-JS-SERVESTATIC-7926865

Author: snyk-bot

package-lock.json

@@ -98,7 +98,7 @@
     "compression": "^1.7.4",
     "cors": "^2.8.5",
     "cron": "^2.4.4",
-    "express": "^4.19.2",
+    "express": "^4.21.0",
     "express-jwt": "^8.4.1",
     "express-openid-connect": "^2.17.1",
     "express-ws": "^5.0.2",