Remove the detail about the timestamp format.

Author: hehe7318

CHANGELOG.md

@@ -29,7 +29,7 @@ This file is used to list changes made in each version of the AWS ParallelCluste
   - Open MPI: openmpi40-aws-4.1.7-2 and openmpi50-aws-5.0.8-11
 
 **BUG FIXES**
-- Fix incorrect timestamp parsing for chef-client.log in CloudWatch Agent configuration. The timestamp format now correctly matches Chef's output format `[YYYY-MM-DDTHH:MM:SS+TZ]`.
+- Fix incorrect timestamp parsing for chef-client.log in CloudWatch Agent configuration.
 - Prevent cluster readiness check failures due to instances launched while the check is in progress.
 - Fix race condition where compute nodes could deploy the wrong cluster config version after an update failure.