build(deps): bump knex from 2.3.0 to 2.4.0 in /apps/user-office-backend

Bumps [knex](https://github.com/knex/knex) from 2.3.0 to 2.4.0.
- [Release notes](https://github.com/knex/knex/releases)
- [Changelog](https://github.com/knex/knex/blob/master/CHANGELOG.md)
- [Commits](knex/knex@2.3.0...2.4.0)

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

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

apps/user-office-backend/package.json

@@ -58,7 +58,7 @@
     "graphql-middleware": "^6.1.15",
     "graphql-tag": "^2.12.6",
     "jsonwebtoken": "^8.5.1",
-    "knex": "^2.3.0",
+    "knex": "^2.4.0",
     "luxon": "^2.3.1",
     "magic-bytes.js": "^1.0.7",
     "muhammara": "^2.3.0",