contracts-bedrock: goerli deploy config

Set the system config start block to the height at which
the system config was initialized. It was initialized
in this transaction:
https://goerli.etherscan.io/tx/0x2ffa580195e51916c00feea8a2d1977793ab1e2c3c44a7101e5c0298b8d829b4
which was at height 8901153.

This value is used as input to the next time that the contract
is initialized.

packages/contracts-bedrock/deploy-config/goerli.json

@@ -5,6 +5,7 @@
   "l1ChainID": 5,
   "l2ChainID": 420,
   "l2BlockTime": 2,
+  "l1BlockTime": 12,
   "maxSequencerDrift": 600,
   "sequencerWindowSize": 3600,
   "channelTimeout": 300,
@@ -36,5 +37,6 @@
   "l2GenesisBlockGasLimit": "0x17D7840",
   "l2GenesisBlockBaseFeePerGas": "0x3b9aca00",
   "eip1559Denominator": 50,
-  "eip1559Elasticity": 10
+  "eip1559Elasticity": 10,
+  "systemConfigStartBlock": 8901153
 }