chore(deps-dev): bump @openzeppelin/contracts from 4.3.3 to 4.9.6

Bumps [@openzeppelin/contracts](https://github.com/OpenZeppelin/openzeppelin-contracts) from 4.3.3 to 4.9.6.
- [Release notes](https://github.com/OpenZeppelin/openzeppelin-contracts/releases)
- [Changelog](https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/CHANGELOG.md)
- [Commits](OpenZeppelin/openzeppelin-contracts@v4.3.3...v4.9.6)

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

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

package.json

@@ -58,7 +58,7 @@
     "@nomiclabs/hardhat-truffle5": "2.0.7",
     "@nomiclabs/hardhat-waffle": "2.0.4",
     "@nomiclabs/hardhat-web3": "2.0.0",
-    "@openzeppelin/contracts": "4.3.3",
+    "@openzeppelin/contracts": "4.9.6",
     "@openzeppelin/contracts-upgradeable": "4.7.3",
     "@openzeppelin/hardhat-upgrades": "1.20.0",
     "@openzeppelin/test-helpers": "0.5.10",