message: contracts-bedrock: Fix provider usage in L2OutputOracle deployment script
  * ci: Tag cloudbuild images with the commit SHA
  * contracts-bedrock: Fix provider usage in L2OutputOracle deployment script
  `getDefaultProvider()` returns a fallback mainnet provider, which doesn't work.
  Builds on
diff: @@ -10,7 +10,7 @@ const deployFn: DeployFunction = async (hre) => {
  const { deployer } = await hre.getNamedAccounts()
  const { deployConfig } = hre
  - const l1 = hre.ethers.getDefaultProvider()
  + const l1 = hre.ethers.provider
  const l1StartingBlock = await l1.getBlock(deployConfig.l1StartingBlockTag)
  if (l1StartingBlock === null) {
  throw new Error(`Cannot fetch block tag ${deployConfig.l1StartingBlockTag}`)
  