Bump express from 4.18.1 to 4.20.0

Bumps [express](https://github.com/expressjs/express) from 4.18.1 to 4.20.0.
- [Release notes](https://github.com/expressjs/express/releases)
- [Changelog](https://github.com/expressjs/express/blob/master/History.md)
- [Commits](expressjs/express@4.18.1...4.20.0)

---
updated-dependencies:
- dependency-name: express
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

plugins/s3-viewer-backend/package.json

@@ -57,7 +57,7 @@
     "@types/express": "*",
     "cookie-parser": "^1.4.5",
     "cross-fetch": "^4.0.0",
-    "express": "^4.17.1",
+    "express": "^4.20.0",
     "express-promise-router": "^4.1.0",
     "knex": "^3.0.0",
     "moment": "^2.29.4",

plugins/s3-viewer-node/package.json

@@ -46,7 +46,7 @@
     "@backstage/backend-plugin-api": "^1.0.0",
     "@spreadshirt/backstage-plugin-s3-viewer-common": "^0.5.7",
     "@types/express": "*",
-    "express": "^4.17.1",
+    "express": "^4.20.0",
     "stream": "^0.0.2"
   }
 }