Add a few more items to the 2.5.1 changelog

Signed-off-by: Tim Lane <[email protected]>

Author: Tim Lane

CHANGELOG.md

@@ -13,6 +13,9 @@ This file is used to list changes made in each version of the AWS ParallelCluste
 **BUG FIXES**
 - Fix installation of NVIDIA drivers on Ubuntu 18.
 - Fix installation of CUDA toolkit on Centos 6.
+- Fix installation of Munge on all but Ubuntu 18.
+- Avoid mounting EBS volumes when not configured.
+- Export shared directories to all CIDR blocks in a VPC rather than just the first one.
 
 2.5.0
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