build(deps): bump express from 4.18.1 to 4.19.1

Bumps [express](https://github.com/expressjs/express) from 4.18.1 to 4.19.1.
- [Release notes](https://github.com/expressjs/express/releases)
- [Changelog](https://github.com/expressjs/express/blob/master/History.md)
- [Commits](expressjs/express@4.18.1...4.19.1)

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

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

package.json

@@ -24,7 +24,7 @@
   "dependencies": {
     "actions-on-google": "^3.0.0",
     "body-parser": "^1.20.0",
-    "express": "^4.18.1",
+    "express": "^4.19.1",
     "firebase-admin": "^11.0.1",
     "firebase-functions": "^3.24.0"
   },