Bump express

Bumps [express](https://github.com/expressjs/express) from 4.17.3 to 4.19.2.
- [Release notes](https://github.com/expressjs/express/releases)
- [Changelog](https://github.com/expressjs/express/blob/master/History.md)
- [Commits](expressjs/express@4.17.3...4.19.2)

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

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

Author: dependabot[bot]

Composer/packages/tools/language-servers/language-understanding/package.json

@@ -22,7 +22,7 @@
     "@bfc/shared": "*",
     "@microsoft/bf-cli-command": "4.14.0-dev.20210604.3f9ee15",
     "@microsoft/bf-lu": "4.15.0-dev.20210702.cbf708d",
-    "express": "4.17.3",
+    "express": "4.19.2",
     "monaco-languageclient": "0.10.2",
     "normalize-url": "^4.5.1",
     "reconnecting-websocket": "^3.2.2",