bumped chart version to v0.28.3 ; added artifacthub.io/changes changelog

Signed-off-by: Alexandre Joris <alexandre.joris@govirtuo.com>

charts/argo-workflows/Chart.yaml

@@ -3,7 +3,7 @@ appVersion: v3.4.8
 name: argo-workflows
 description: A Helm chart for Argo Workflows
 type: application
-version: 0.28.2
+version: 0.28.3
 icon: https://argoproj.github.io/argo-workflows/assets/logo.png
 home: https://github.com/argoproj/argo-helm
 sources:
@@ -16,5 +16,5 @@ annotations:
     fingerprint: 2B8F22F57260EFA67BE1C5824B11F800CD9D2252
     url: https://argoproj.github.io/argo-helm/pgp_keys.asc
   artifacthub.io/changes: |
-    - kind: changed
-      description: Upgrade to Argo Workflows v3.4.8
+    - kind: fixed
+      description: Fixed GCS keyFormat template example in values.yaml