Bump the hardhat group across 1 directory with 2 updates

Bumps the hardhat group with 2 updates in the / directory: [@nomicfoundation/hardhat-toolbox](https://github.com/NomicFoundation/hardhat/tree/HEAD/packages/hardhat-toolbox) and [hardhat](https://github.com/NomicFoundation/hardhat/tree/HEAD/packages/hardhat).


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)

Updates `hardhat` from 2.28.6 to 3.8.0
- [Release notes](https://github.com/NomicFoundation/hardhat/releases)
- [Changelog](https://github.com/NomicFoundation/hardhat/blob/main/packages/hardhat/CHANGELOG.md)
- [Commits](https://github.com/NomicFoundation/hardhat/commits/hardhat@3.8.0/packages/hardhat)

---
updated-dependencies:
- dependency-name: "@nomicfoundation/hardhat-toolbox"
  dependency-version: 7.0.0
  dependency-type: direct:development
  update-type: version-update:semver-major
  dependency-group: hardhat
- dependency-name: hardhat
  dependency-version: 3.7.0
  dependency-type: direct:development
  update-type: version-update:semver-major
  dependency-group: hardhat
...

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

Author: dependabot[bot]