Bump @openzeppelin/contracts-upgradeable from 4.8.3 to 4.9.6

Bumps [@openzeppelin/contracts-upgradeable](https://github.com/OpenZeppelin/openzeppelin-contracts-upgradeable) from 4.8.3 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@v4.8.3...v4.9.6)

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

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

Author: dependabot[bot]

package.json

@@ -77,7 +77,7 @@
     "@nomiclabs/hardhat-etherscan": "3.1.7",
     "@nomiclabs/hardhat-waffle": "2.0.5",
     "@openzeppelin/contracts": "4.8.3",
-    "@openzeppelin/contracts-upgradeable": "4.8.3",
+    "@openzeppelin/contracts-upgradeable": "4.9.6",
     "@tenderly/hardhat-tenderly": "2.1.0",
     "@typechain/ethers-v5": "10.2.0",
     "@typechain/hardhat": "6.1.5",