chore(argo-rollouts): Upgrade argo-rollouts to 1.3.1 (#1500)

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

charts/argo-rollouts/Chart.yaml

@@ -1,8 +1,8 @@
 apiVersion: v2
-appVersion: v1.3.0
+appVersion: v1.3.1
 description: A Helm chart for Argo Rollouts
 name: argo-rollouts
-version: 2.21.0
+version: 2.21.1
 home: https://github.com/argoproj/argo-helm
 icon: https://argoproj.github.io/argo-rollouts/assets/logo.png
 keywords:
@@ -15,4 +15,4 @@ maintainers:
     url: https://argoproj.github.io/
 annotations:
   artifacthub.io/changes: |
-    - "[Changed]: Upgrade ArgoRollouts to v1.3.0"
+    - "[Changed]: Upgrade ArgoRollouts to v1.3.1"