Updated changes in CHANGELOG.md file.

Author: Bruce J Palmer

CHANGELOG.md

@@ -9,6 +9,13 @@ This project follows the [Gitflow Workflow model](https://www.atlassian.com/git/
 ## [Unreleased]
 The Unreleased section will be empty for tagged releases. Unreleased functionality appears in the develop branch.
 
+## [5.9.1]
+- Changed
+  - Updated versions of blaspp, lapackpp
+- Fixed
+  - Fixed a bug in the fortran interface for the nga_rand function
+  - Removed minor memory leak from EAF_Delete function
+
 ## [5.9.1]
 - Changed
   - Updated OS's for continuous integration