chore(deps): bump express from 4.16.4 to 4.17.3

Bumps [express](https://github.com/expressjs/express) from 4.16.4 to 4.17.3.
- [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/4.16.4...4.17.3)

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

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

packages/backend/package.json

@@ -37,7 +37,7 @@
     "crypto-js": "^4.1.1",
     "debug": "~2.6.9",
     "dotenv": "^10.0.0",
-    "express": "~4.16.1",
+    "express": "~4.17.3",
     "express-basic-auth": "^1.2.1",
     "express-graphql": "^0.12.0",
     "fast-xml-parser": "^4.0.11",