chore: release eventarc 1.1.0 (#5364)

diff --git a/eventarc/CHANGES.md b/eventarc/CHANGES.md
index e8ff0aa9..e266bc0 100644
--- a/eventarc/CHANGES.md
+++ b/eventarc/CHANGES.md
@@ -1,5 +1,12 @@
 # Changes
 
+## [1.1.0](https://www.github.com/googleapis/google-cloud-go/compare/eventarc/v1.0.0...eventarc/v1.1.0) (2022-01-14)
+
+
+### Features
+
+* **eventarc/publishing:** start generating apiv1 ([#5358](https://www.github.com/googleapis/google-cloud-go/issues/5358)) ([0da1a9d](https://www.github.com/googleapis/google-cloud-go/commit/0da1a9d4e2d3dd0fab07c3ed09eaeeb3f9711900))
+
 ## 1.0.0
 
 Stabilize GA surface.
@@ -8,4 +15,3 @@
 
 This is the first tag to carve out eventarc as its own module. See
 [Add a module to a multi-module repository](https://github.com/golang/go/wiki/Modules#is-it-possible-to-add-a-module-to-a-multi-module-repository).
-