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.