Bump @openzeppelin/contracts from 5.3.0 to 5.4.0 in /contracts (#276)

Bumps [@openzeppelin/contracts](https://github.com/OpenZeppelin/openzeppelin-contracts) from 5.3.0 to 5.4.0.
- [Release notes](https://github.com/OpenZeppelin/openzeppelin-contracts/releases)
- [Changelog](https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/CHANGELOG.md)
- [Commits](OpenZeppelin/openzeppelin-contracts@v5.3.0...v5.4.0)

---
updated-dependencies:
- dependency-name: "@openzeppelin/contracts"
  dependency-version: 5.4.0
  dependency-type: direct:development
...

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

Author: dependabot[bot]

contracts/package.json

@@ -12,6 +12,6 @@
     "generate": "go generate ./gen"
   },
   "devDependencies": {
-    "@openzeppelin/contracts": "^5.3.0"
+    "@openzeppelin/contracts": "^5.4.0"
   }
 }