fix(argo-rollouts): Align changelog structure

relates to #1808

Was fixed already for:

- [x] [argo-cd](#1810)
- [x] [argo-workflows](#1812)
- [x] [argo-events](#1813)

Signed-off-by: jmeridth <jmeridth@gmail.com>

charts/argo-rollouts/Chart.yaml

@@ -2,7 +2,7 @@ apiVersion: v2
 appVersion: v1.4.0
 description: A Helm chart for Argo Rollouts
 name: argo-rollouts
-version: 2.22.1
+version: 2.22.2
 home: https://github.com/argoproj/argo-helm
 icon: https://argoproj.github.io/argo-rollouts/assets/logo.png
 keywords:
@@ -15,4 +15,5 @@ maintainers:
     url: https://argoproj.github.io/
 annotations:
   artifacthub.io/changes: |
-    - "[Added]: Flags to toggle provider-specific RBAC rules in Role and ClusterRole"
+    - kind: fixed
+      description: Align changelog structure to show changelogs on Artifact Hub