fix: packages/plugins/audit/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

packages/plugins/audit/package.json

@@ -32,7 +32,7 @@
   "dependencies": {
     "@verdaccio/config": "workspace:7.0.0-next-7.20",
     "@verdaccio/core": "workspace:7.0.0-next-7.20",
-    "express": "4.19.2",
+    "express": "4.20.0",
     "https-proxy-agent": "5.0.1",
     "node-fetch": "cjs"
   },