chore(argo-events): Upgrade argo-events to 1.8.1 (#2247)

https://github.com/argoproj/argo-events/releases/tag/v1.8.1

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

charts/argo-events/Chart.yaml

@@ -1,8 +1,8 @@
 apiVersion: v2
-appVersion: v1.8.0
+appVersion: v1.8.1
 description: A Helm chart for Argo Events, the event-driven workflow automation framework
 name: argo-events
-version: 2.4.0
+version: 2.4.1
 home: https://github.com/argoproj/argo-helm
 icon: https://avatars.githubusercontent.com/u/30269780?s=200&v=4
 keywords:
@@ -19,6 +19,4 @@ annotations:
     url: https://argoproj.github.io/argo-helm/pgp_keys.asc
   artifacthub.io/changes: |
     - kind: changed
-      description: Upgrade Argo Events to v1.8.0
-    - kind: added
-      description: Add managed namespace configuration
+      description: Upgrade Argo Events to v1.8.1