Bump @openzeppelin/contracts from 4.7.3 to 4.9.2

Bumps [@openzeppelin/contracts](https://github.com/OpenZeppelin/openzeppelin-contracts) from 4.7.3 to 4.9.2.
- [Release notes](https://github.com/OpenZeppelin/openzeppelin-contracts/releases)
- [Changelog](https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v4.9.2/CHANGELOG.md)
- [Commits](OpenZeppelin/openzeppelin-contracts@v4.7.3...v4.9.2)

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

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

Author: dependabot[bot]

hardhat/package.json

@@ -55,7 +55,7 @@
   },
   "dependencies": {
     "@eth-optimism/plugins": "1.0.0-alpha.3",
-    "@openzeppelin/contracts": "^4.7.3",
+    "@openzeppelin/contracts": "^4.9.6",
     "axios": "^0.27.2"
   }
 }