Bump express from 4.17.1 to 4.19.2 in /examples/facebook

Bumps [express](https://github.com/expressjs/express) from 4.17.1 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@4.17.1...4.19.2)

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

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

examples/facebook/package.json

@@ -9,7 +9,7 @@
     "axios": "^0.21.1",
     "body-parser": "^1.19.0",
     "dotenv": "^8.2.0",
-    "express": "^4.17.1",
+    "express": "^4.19.2",
     "js-yaml": "^4.0.0"
   }
 }