chore: release channel 1.2.0 (#5417)

diff --git a/channel/CHANGES.md b/channel/CHANGES.md
index 4366d3f..b868ebd 100644
--- a/channel/CHANGES.md
+++ b/channel/CHANGES.md
@@ -1,5 +1,12 @@
 # Changes
 
+## [1.2.0](https://www.github.com/googleapis/google-cloud-go/compare/channel/v1.1.0...channel/v1.2.0) (2022-02-03)
+
+
+### Features
+
+* **channel:** Change description for enum default value ([f560b1e](https://www.github.com/googleapis/google-cloud-go/commit/f560b1ed0263956ef84fbf2fbf34bdc66dbc0a88))
+
 ## [1.1.0](https://www.github.com/googleapis/google-cloud-go/compare/channel/v1.0.0...channel/v1.1.0) (2021-10-29)