Bump hardhat from 2.16.1 to 2.22.4 in /proxy

Bumps [hardhat](https://github.com/nomiclabs/hardhat) from 2.16.1 to 2.22.4.
- [Release notes](https://github.com/nomiclabs/hardhat/releases)
- [Commits](https://github.com/nomiclabs/hardhat/compare/hardhat@2.16.1...hardhat@2.22.4)

---
updated-dependencies:
- dependency-name: hardhat
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

proxy/package.json

@@ -31,7 +31,7 @@
         "axios": "^0.21.4",
         "dotenv": "^16.0.0",
         "ethers": "^5.7.2",
-        "hardhat": "2.11.0 - 2.16.1"
+        "hardhat": "2.11.0 - 2.22.5"
     },
     "devDependencies": {
         "@nomiclabs/hardhat-etherscan": "^3.1.0",