fix(argocd-notifications): Use correct chart icon url (#872)

Signed-off-by: Marco Kilchhofer <mkilchhofer@users.noreply.github.com>

Co-authored-by: David J. M. Karlsen <david@davidkarlsen.com>

charts/argocd-notifications/Chart.yaml

@@ -3,9 +3,9 @@ appVersion: 1.1.1
 description: A Helm chart for ArgoCD notifications, an add-on to ArgoCD.
 name: argocd-notifications
 type: application
-version: 1.4.2
+version: 1.4.3
 home: https://github.com/argoproj/argo-helm
-icon: https://raw.githubusercontent.com/argoproj/argo/master/docs/assets/argo.png
+icon: https://argocd-notifications.readthedocs.io/en/stable/assets/logo.png
 keywords:
   - argoproj
   - argocd
@@ -15,4 +15,4 @@ maintainers:
   - name: andyfeller
 annotations:
   artifacthub.io/changes: |
-    - "[Added]: Example for 'defaultTriggers'"
+    - "[Fixed]: Use correct chart icon url"