chore(deps-dev): bump @openzeppelin/contracts-upgradeable

Bumps [@openzeppelin/contracts-upgradeable](https://github.com/OpenZeppelin/openzeppelin-contracts-upgradeable) from 4.7.3 to 4.9.6.
- [Release notes](https://github.com/OpenZeppelin/openzeppelin-contracts-upgradeable/releases)
- [Changelog](https://github.com/OpenZeppelin/openzeppelin-contracts-upgradeable/blob/master/CHANGELOG.md)
- [Commits](OpenZeppelin/openzeppelin-contracts-upgradeable@v4.7.3...v4.9.6)

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

Signed-off-by: dependabot[bot] <[email protected]>

package.json

@@ -59,7 +59,7 @@
     "@nomiclabs/hardhat-waffle": "2.0.4",
     "@nomiclabs/hardhat-web3": "2.0.0",
     "@openzeppelin/contracts": "4.3.3",
-    "@openzeppelin/contracts-upgradeable": "4.7.3",
+    "@openzeppelin/contracts-upgradeable": "4.9.6",
     "@openzeppelin/hardhat-upgrades": "1.20.0",
     "@openzeppelin/test-helpers": "0.5.10",
     "@smartdec/smartcheck": "2.0.1",