Update CHANGELOG.md

Author: ibodrov

CHANGELOG.md

@@ -5,7 +5,9 @@
 ### Changed
 
 - project: use JSch fork
-([#1210](https://github.com/walmartlabs/concord/pull/1210)).
+([#1210](https://github.com/walmartlabs/concord/pull/1210));
+- slack-tasks: update readme with required oauth scope info
+([#1213](https://github.com/walmartlabs/concord/pull/1213)).