Merge pull request #3673 from ethereum-optimism/ctg/deploy-ledger

contracts-governance: allow deploy by ledger

packages/contracts-governance/hardhat.config.ts

 import dotenv from 'dotenv'
 import { HardhatUserConfig } from 'hardhat/config'
+import { getenv } from '@eth-optimism/core-utils'
 import '@nomiclabs/hardhat-ethers'
 import '@nomiclabs/hardhat-etherscan'
 import '@nomiclabs/hardhat-waffle'
 import 'hardhat-gas-reporter'
 import 'solidity-coverage'
 import '@eth-optimism/hardhat-deploy-config'
+import 'hardhat-deploy'
 
 import './scripts/deploy-token'
 import './scripts/multi-send'
@@ -76,6 +78,14 @@ const config: HardhatUserConfig = {
   etherscan: {
     apiKey: process.env.ETHERSCAN_API_KEY,
   },
+  namedAccounts: {
+    deployer: {
+      default: getenv('LEDGER_ADDRESS')
+        ? `ledger://${getenv('LEDGER_ADDRESS')}`
+        : 0,
+      hardhat: 0,
+    },
+  },
 }
 
 export default config