build(deps): Bump validator from 13.15.15 to 13.15.20 in /server (#1402)

Bumps [validator](https://github.com/validatorjs/validator.js) from 13.15.15 to 13.15.20.
- [Release notes](https://github.com/validatorjs/validator.js/releases)
- [Changelog](https://github.com/validatorjs/validator.js/blob/master/CHANGELOG.md)
- [Commits](https://github.com/validatorjs/validator.js/compare/13.15.15...13.15.20)

---
updated-dependencies:
- dependency-name: validator
  dependency-version: 13.15.20
  dependency-type: direct:production
...

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

server/package.json

@@ -71,7 +71,7 @@
     "serve-static": "^1.16.2",
     "sharp": "^0.33.5",
     "uuid": "^9.0.1",
-    "validator": "^13.15.15",
+    "validator": "^13.15.20",
     "winston": "^3.17.0",
     "zxcvbn": "^4.4.2"
   },