Bump validator from 13.15.0 to 13.15.20 in /src/Libraries/Microsoft.Extensions.AI.Evaluation.Reporting/TypeScript (#6974)

* Bump validator

Bumps [validator](https://github.com/validatorjs/validator.js) from 13.15.0 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](validatorjs/validator.js@13.15.0...13.15.20)

---
updated-dependencies:
- dependency-name: validator
  dependency-version: 13.15.20
  dependency-type: indirect
...

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

* Fix up nuget reference

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Peter Waldschmidt <pewaldsc@microsoft.com>

Author: dependabot[bot]