Update 08-ouroboros-overview.mdx

Author: olgahryniuk

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

@@ -67,7 +67,7 @@ From an application point of view, Chronos can dramatically boost the resilience
 
 ### Ouroboros Leios
 
-[Ouroboros Leios](https://iohk.io/en/research/library/papers/high-throughput-blockchain-consensus-under-realistic-network-assumptions/), currently in research and development, is the protocol version designed to increase the network's throughput by optimizing the use of available resources and enabling faster transaction processing and confirmation.
+[Ouroboros Leios](https://iohk.io/en/research/library/papers/high-throughput-permissionless-blockchain-consensus-under-realistic-network-assumptions/), currently in research and development, is the protocol version designed to increase the network's throughput by optimizing the use of available resources and enabling faster transaction processing and confirmation.
 
 Leios is specifically designed to solve scalability bottlenecks in existing systems by acting as a high-throughput overlay on top of base protocols. It tackles malicious actions like protocol bursts (sudden floods of valid messages to congest the network) and equivocations (double-signing attacks), enabling near-optimal transaction processing while preserving security under real-world network constraints.