Update 0.8.0.md

Author: rasika-chivate

docs/release-notes/0.8.0.md

@@ -62,3 +62,5 @@ For more information, see our [documentation](https://docs.percona.com/percona-c
 * [PCSM-254](https://perconadev.atlassian.net/browse/PCSM-254): Fixed an issue where PCSM underutilized system resources during change stream replication. This caused replication lag to increase even on high-capacity machines. PCSM now parallelizes change stream processing more efficiently, improving resource usage and reducing lag.
 
 * [PCSM-257](https://perconadev.atlassian.net/browse/PCSM-257): Fixed an issue where PCSM attempted to recreate a view after encountering transient errors, such as primary stepdowns. In MongoDB 6.0, the view was already created before the error occurred, resulting in a `NamespaceExists` error during the retry. PCSM now correctly handles this situation, preventing replication failures.
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+* [PCSM-294](https://perconadev.atlassian.net/browse/PCSM-294): Fixed an issue in **Percona ClusterSync for MongoDB (PCSM)** where the service crashed during the change replication phase when handling complex document updates, resulting in **BufBuilder memory exhaustion** and **invalid `$slice` argument errors**. This problem, first observed in customer migrations from **Atlas** to **EKS environments**, has been resolved by improving memory management and validation logic, ensuring stable replication of complex document changes.