chore(deps): bump @openzeppelin/contracts in /packages/hardhat

Bumps [@openzeppelin/contracts](https://github.com/OpenZeppelin/openzeppelin-contracts) from 4.9.1 to 4.9.3.
- [Release notes](https://github.com/OpenZeppelin/openzeppelin-contracts/releases)
- [Changelog](https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v4.9.3/CHANGELOG.md)
- [Commits](OpenZeppelin/openzeppelin-contracts@v4.9.1...v4.9.3)

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

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

packages/hardhat/package.json

@@ -24,7 +24,7 @@
     },
     "dependencies": {
         "@celo/contracts": "^9.0.0",
-        "@openzeppelin/contracts": "^4.9.1",
+        "@openzeppelin/contracts": "^4.9.3",
         "ganache": "^7.5.0",
         "typescript": "^4.8.4"
     }