Bump express from 4.18.3 to 4.21.1 in /node

Bumps [express](https://github.com/expressjs/express) from 4.18.3 to 4.21.1.
- [Release notes](https://github.com/expressjs/express/releases)
- [Changelog](https://github.com/expressjs/express/blob/4.21.1/History.md)
- [Commits](expressjs/express@4.18.3...4.21.1)

---
updated-dependencies:
- dependency-name: express
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

node/package.json

@@ -20,7 +20,7 @@
     "dependencies": {
         "applicationinsights": "2.9.5",
         "compression": "1.7.4",
-        "express": "4.18.3",
+        "express": "4.21.1",
         "find": "0.3.0",
         "morgan": "1.10.0",
         "prettysize": "2.0.0"