[chore] upgrade express to fix npm audit warning (#19298)

## Description 

Describe the changes or additions included in this PR.

## Test plan 

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---

## Release notes

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that describes the impact of your changes that a user might notice and
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- [ ] Protocol: 
- [ ] Nodes (Validators and Full nodes): 
- [ ] Indexer: 
- [ ] JSON-RPC: 
- [ ] GraphQL: 
- [ ] CLI: 
- [ ] Rust SDK:
- [ ] REST API:

examples/trading/api/package.json

@@ -28,6 +28,6 @@
 		"@mysten/sui": "workspace:*",
 		"@prisma/client": "^5.16.2",
 		"cors": "^2.8.5",
-		"express": "^4.19.2"
+		"express": "^4.20.0"
 	}
 }