contracts-bedrock: fix deployment

It was being deployed with the implementation address
of the `L2OutputOracle` instead of the proxy. This
was preventing output commitments to actually be posted.

.changeset/many-wasps-notice.md

+---
+'@eth-optimism/contracts-bedrock': patch
+---
+
+Fix portal deployment to have L2OutputOracle proxy address

packages/contracts-bedrock/deploy/001-OptimismPortal.deploy.ts

@@ -17,7 +17,7 @@ const deployFn: DeployFunction = async (hre) => {
     waitConfirmations: deployConfig.deploymentWaitConfirmations,
   })
 
-  const oracle = await get('L2OutputOracle')
+  const oracle = await get('L2OutputOracleProxy')
 
   await deploy('OptimismPortal', {
     from: deployer,