Bump express from 4.18.1 to 4.19.2 in /unfurler

Bumps [express](https://github.com/expressjs/express) from 4.18.1 to 4.19.2.
- [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/4.18.1...4.19.2)

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

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

unfurler/package.json

@@ -18,7 +18,7 @@
   },
   "dependencies": {
     "@types/node": "^16.11.41",
-    "express": "^4.18.0",
+    "express": "^4.19.2",
     "puppeteer": "^15.3.2",
     "puppeteer-cluster": "^0.23.0",
     "typescript": "~4.7.4"