Update proxy and guardian for OP Sepolia #659
Description
hey, we recently updated the proxy admin owner and the guardian for OP Sepolia, so <https://docs.optimism.io/chain/security/privileged-roles#mitigations|this page> needs an update. The new addresses can be found here: https://github.com/ethereum-optimism/superchain-registry/blob/main/superchain/extra/addresses/sepolia/op.json