Update dependency @nomicfoundation/hardhat-toolbox to v6

Author: renovate[bot]

package.json

@@ -24,7 +24,7 @@
 		"@nomicfoundation/hardhat-ignition": "^0.15.5",
 		"@nomicfoundation/hardhat-ignition-ethers": "^0.15.5",
 		"@nomicfoundation/hardhat-network-helpers": "^1.0.11",
-		"@nomicfoundation/hardhat-toolbox": "^5.0.0",
+		"@nomicfoundation/hardhat-toolbox": "^6.0.0",
 		"@nomicfoundation/hardhat-verify": "^2.0.8",
 		"@nomicfoundation/ignition-core": "^0.15.5",
 		"@openzeppelin/contracts": "5.3.0",