Bump qs and express in /preview

Bumps [qs](https://github.com/ljharb/qs) to 6.11.0 and updates ancestor dependency [express](https://github.com/expressjs/express). These dependencies need to be updated together.


Updates `qs` from 6.7.0 to 6.11.0
- [Release notes](https://github.com/ljharb/qs/releases)
- [Changelog](https://github.com/ljharb/qs/blob/main/CHANGELOG.md)
- [Commits](https://github.com/ljharb/qs/compare/v6.7.0...v6.11.0)

Updates `express` from 4.17.1 to 4.18.2
- [Release notes](https://github.com/expressjs/express/releases)
- [Changelog](https://github.com/expressjs/express/blob/master/History.md)
- [Commits](https://github.com/expressjs/express/compare/4.17.1...4.18.2)

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

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

preview/package.json

@@ -11,7 +11,7 @@
   "keywords": [],
   "author": "Microsoft Corporation",
   "dependencies": {
-    "express": "^4.17.1",
+    "express": "^4.18.2",
     "http-proxy-middleware": "^1.1.0",
     "node-fetch": "^2.6.1"
   }