build(deps): bump zod from 3.21.4 to 3.22.3 in /backend

Bumps [zod](https://github.com/colinhacks/zod) from 3.21.4 to 3.22.3.
- [Release notes](https://github.com/colinhacks/zod/releases)
- [Changelog](https://github.com/colinhacks/zod/blob/master/CHANGELOG.md)
- [Commits](https://github.com/colinhacks/zod/compare/v3.21.4...v3.22.3)

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

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

backend/package.json

@@ -76,7 +76,7 @@
     "uuid": "^9.0.0",
     "yawn-yaml": "github:dragory/yawn-yaml#string-number-fix-build",
     "zlib-sync": "^0.1.7",
-    "zod": "^3.7.2"
+    "zod": "^3.22.3"
   },
   "devDependencies": {
     "@types/cors": "^2.8.5",