feat(argo-rollouts): upgrade to v1.2.0 (#1135)

* feat(argo-rollouts): upgrade to v1.2.0-rc1

Signed-off-by: Hui Kang <hui.kang@salesforce.com>

* [argo-rollouts]:bump minor version and add release version

Signed-off-by: Hui Kang <hui.kang@salesforce.com>

charts/argo-rollouts/Chart.yaml

@@ -1,8 +1,8 @@
 apiVersion: v2
-appVersion: "v1.1.1"
+appVersion: "v1.2.0"
 description: A Helm chart for Argo Rollouts
 name: argo-rollouts
-version: 2.11.0
+version: 2.12.0
 icon: https://argoproj.github.io/argo-rollouts/assets/logo.png
 home: https://github.com/argoproj/argo-helm
 maintainers:
@@ -11,4 +11,4 @@ maintainers:
   - name: jessesuen
 annotations:
   artifacthub.io/changes: |
-    - "[Added]: Argo rollouts notification secret and configmap"
+    - "[Added]: Upgrade argo-rollouts to v1.2.0"