Add Changelog entry

Author: IshaanDesai

CHANGELOG.md

@@ -2,6 +2,7 @@
 
 ## latest
 
+- Remove MPI initialization from pyFANS and add an integration test for it https://github.com/DataAnalyticsEngineering/FANS/pull/46
 - Native support for MacOS https://github.com/DataAnalyticsEngineering/FANS/pull/25
 - Remove Ubuntu 20.04 from testing and Docker support https://github.com/DataAnalyticsEngineering/FANS/pull/51
 - Add support for `--version` command line argument for checking the version of FANS