Fix a link

Author: olgahryniuk

docs/about-cardano/03-learn/08-ouroboros-overview.mdx

@@ -29,7 +29,7 @@ Ouroboros comes in different versions:
 -   [Ouroboros Genesis](https://iohk.io/en/research/library/papers/ouroboros-genesiscomposable-proof-of-stake-blockchains-with-dynamic-availability/)
 -   [Ouroboros Crypsinous](https://iohk.io/en/research/library/papers/ouroboros-crypsinousprivacy-preserving-proof-of-stake/)
 -   [Ouroboros Chronos](https://iohk.io/en/research/library/papers/ouroboros-chronospermissionless-clock-synchronization-via-proof-of-stake/)
--   [Ouroboros Leios](https://iohk.io/en/research/library/papers/high-throughput-blockchain-consensus-under-realistic-network-assumptions/).
+-   [Ouroboros Leios](https://iohk.io/en/research/library/papers/high-throughput-permissionless-blockchain-consensus-under-realistic-network-assumptions/).
 
 ### Ouroboros Classic