Chore: Update Changelog (#2597)

* Chore: Update Changelog

* Typo: in changelog

CHANGELOG.md

@@ -1,14 +1,14 @@
 # Changelog
 
-## Unreleased
+## v1.6.1 [2021-07-22]
 
 ### Features
 - [#2589](https://github.com/influxdata/kapacitor/pull/2589): Flag for blacklisting CIDR ranges for certain handlers, and nodes
 - [#2591](https://github.com/influxdata/kapacitor/pull/2591): Flag for disabling alert handlers, this is useful for security (such as disabling exec on a shared machine)
 
 ### Bugfixes
-- [#2585](https://github.com/influxdata/kapacitor/pull/2585):Make DeleteGroupMessage align with GroupInfoer interface, thanks @prashanthjbabu!
-- [#2596](https://github.com/influxdata/kapacitor/pull/2596): Fix: payload serialization for BigPanda
+- [#2585](https://github.com/influxdata/kapacitor/pull/2585): Make DeleteGroupMessage align with GroupInfoer interface, thanks @prashanthjbabu!
+- [#2596](https://github.com/influxdata/kapacitor/pull/2596): Fix payload serialization for BigPanda
 
 ## v1.6.0 [2021-06-28]