Bump @nomicfoundation/hardhat-toolbox from 5.0.0 to 6.0.0

Bumps [@nomicfoundation/hardhat-toolbox](https://github.com/nomicfoundation/hardhat) from 5.0.0 to 6.0.0.
- [Release notes](https://github.com/nomicfoundation/hardhat/releases)
- [Commits](https://github.com/nomicfoundation/hardhat/compare/@nomicfoundation/hardhat-toolbox@5.0.0...@nomicfoundation/hardhat-toolbox@6.0.0)

---
updated-dependencies:
- dependency-name: "@nomicfoundation/hardhat-toolbox"
  dependency-version: 6.0.0
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

package.json

@@ -7,6 +7,6 @@
     "deploy": "npx hardhat run scripts/deploy.js --network localhost"
   },
   "devDependencies": {
-    "@nomicfoundation/hardhat-toolbox": "^5.0.0"
+    "@nomicfoundation/hardhat-toolbox": "^6.0.0"
   }
 }