chore: adding changelog entry

Author: chatton

CHANGELOG.md

@@ -21,6 +21,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
     By using one or the other, you are losing the ability to rollback or replay transactions earlier than `HEAD-n`.
     When using _classic pruning_, you aren't able to fetch blocks prior to `HEAD-n`.
 
+### Fixed
+
+- Fix block timer to account for execution time. Previously, the block timer reset to the full `block_time` duration after `ProduceBlock` completed, making the effective interval `block_time + execution_time`. Now the timer subtracts elapsed execution time so blocks are produced at the configured cadence.
+
 ### Changes
 
 - Store pending blocks separately from executed blocks key. [#3073](https://github.com/evstack/ev-node/pull/3073)