[Doc] Update changelog for 3.13.1: remove bug fix on shutdown for ubuntu24.

Author: gmarciani

CHANGELOG.md

@@ -17,7 +17,6 @@ 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-5.0.6
 
 **BUG FIXES**
-- Fix a bug in the installation of ARM Performance Library that was causing the build image fail in isolated environments.
 - Upgrade amazon-efs-utils to version 2.3.1 (from v2.1.0) for non-Amazon Linux AMI's.
 
 3.13.0