Add changelog entry for #115

Author: AbhyudayaSharma

CHANGELOG.md

@@ -1,11 +1,9 @@
 # Changelog
 
-## In Development
-* Allow injection of datastore key in cluster (#115) (by @AngryDeveloper)
-
 ## v0.31.0
 
 * Makes the chart compatible with Helm versions >= `2.16.8` by downgrading `mongodb-replicaset` from `3.14.0` to `3.12.0` (#137) (by @AbhyudayaSharma)
+* Allow injection of datastore key in cluster (#115) (by @AngryDeveloper)
 
 ## v0.30.0
 * Pin st2 version to `v3.3dev` as a new latest development version (#129)