Bump @openzeppelin/contracts (#1081)

Bumps [@openzeppelin/contracts](https://github.com/OpenZeppelin/openzeppelin-contracts) from 4.8.3 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@v4.8.3...v4.9.2)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

template/examples/contract-erc20/truffle/package.json

@@ -2,7 +2,7 @@
   "name": "substrate-evm-contracts",
   "version": "0.0.0",
   "dependencies": {
-    "@openzeppelin/contracts": "^4.8.3",
+    "@openzeppelin/contracts": "^4.9.2",
     "truffle": "^5.6.7"
   }
 }