chore(deps): bump @openzeppelin/contracts from 4.6.0 to 4.7.1

Bumps [@openzeppelin/contracts](https://github.com/OpenZeppelin/openzeppelin-contracts) from 4.6.0 to 4.7.1.
- [Release notes](https://github.com/OpenZeppelin/openzeppelin-contracts/releases)
- [Changelog](https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/CHANGELOG.md)
- [Commits](OpenZeppelin/openzeppelin-contracts@v4.6.0...v4.7.1)

---
updated-dependencies:
- dependency-name: "@openzeppelin/contracts"
  dependency-type: indirect
...

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