Broken link to Barnabe's summary on discouragement attacks

[dapplion]

Line

annotated-spec/phase0/beacon-chain.md

Line 2017 in 98c63eb

This rule that your rewards decrease if other validators do less well was included to disincentivize harming other validators; see [my writing on discouragement attacks](https://github.com/ethereum/research/blob/master/papers/discouragement/discouragement.pdf) (and [Barnabe's summary](https://hackingresear.ch/discouragement-attacks/)) for reasoning why this is a good idea.

Links https://hackingresear.ch/discouragement-attacks/ whose domain is not longer active

[staccDOTsol]

Thank you for bringing this to my attention. I apologize for the broken link. Unfortunately, it seems that the domain for the resource on discouragement attacks, hackingresear.ch, is no longer active. As a result, the link provided in the Ethereum annotated specification is no longer accessible. I recommend reaching out to the Ethereum community or exploring other reputable sources to gather information on discouragement attacks in the context of Ethereum.