Bump joi from 17.8.3 to 17.9.0 in /server (#241)

Bumps [joi](https://github.com/hapijs/joi) from 17.8.3 to 17.9.0.
- [Release notes](https://github.com/hapijs/joi/releases)
- [Commits](hapijs/joi@v17.8.3...v17.9.0)

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

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

server/package.json

@@ -16,7 +16,7 @@
     "express": "^4.18.1",
     "express-session": "^1.17.3",
     "helmet": "^6.0.1",
-    "joi": "^17.8.3",
+    "joi": "^17.9.0",
     "path": "^0.12.7",
     "pg": "^8.8.0",
     "pg-hstore": "^2.3.4",