Config: Fixes ethereum/eipw#113

[SamWilsn]

Update eipw.toml: Fixes ethereum/eipw#113

There's a more permanent fix upcoming in https://github.com/eips-wg/build/blob/master/.github/actions/checkout-eips/action.yml but that's a while out.

[eth-bot]

File config/eipw.toml

Requires 2 more reviewers from @axic, @g11tech, @gcolvin, @lightclient, @xinbenlv