Bump js-yaml and @nomicfoundation/hardhat-toolbox

Bumps [js-yaml](https://github.com/nodeca/js-yaml) to 4.3.1 and updates ancestor dependency [@nomicfoundation/hardhat-toolbox](https://github.com/NomicFoundation/hardhat/tree/HEAD/packages/hardhat-toolbox). These dependencies need to be updated together.


Updates `js-yaml` from 4.1.1 to 4.3.1
- [Changelog](https://github.com/nodeca/js-yaml/blob/4.3.1/CHANGELOG.md)
- [Commits](nodeca/js-yaml@4.1.1...4.3.1)

Updates `@nomicfoundation/hardhat-toolbox` from 5.0.0 to 7.0.0
- [Release notes](https://github.com/NomicFoundation/hardhat/releases)
- [Changelog](https://github.com/NomicFoundation/hardhat/blob/@nomicfoundation/hardhat-toolbox@7.0.0/packages/hardhat-toolbox/CHANGELOG.md)
- [Commits](https://github.com/NomicFoundation/hardhat/commits/@nomicfoundation/hardhat-toolbox@7.0.0/packages/hardhat-toolbox)

---
updated-dependencies:
- dependency-name: js-yaml
  dependency-version: 4.3.1
  dependency-type: indirect
- dependency-name: "@nomicfoundation/hardhat-toolbox"
  dependency-version: 7.0.0
  dependency-type: direct:development
...

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

Author: dependabot[bot]