fix: components/ws-manager-bridge/package.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

components/ws-manager-bridge/package.json

@@ -30,7 +30,7 @@
     "@gitpod/ws-manager": "0.1.5",
     "@gitpod/ws-manager-bridge-api": "0.1.5",
     "amqplib": "^0.8.0",
-    "express": "^4.17.3",
+    "express": "^4.21.0",
     "inversify": "^6.0.1",
     "ioredis": "^5.3.2",
     "prom-client": "^13.2.0",