Longhorn: Upgrade from 1.8.1 to 1.9.0

Change-Id: I809890d3f73e85119c5f3d97e53856bd371c8c81
diff --git a/charts/longhorn/Chart.yaml b/charts/longhorn/Chart.yaml
index 07777a4..b7df667 100644
--- a/charts/longhorn/Chart.yaml
+++ b/charts/longhorn/Chart.yaml
@@ -1,5 +1,5 @@
 apiVersion: v1
-appVersion: v1.8.1
+appVersion: v1.9.0
 description: Longhorn is a distributed block storage system for Kubernetes.
 home: https://github.com/longhorn/longhorn
 icon: https://raw.githubusercontent.com/cncf/artwork/master/projects/longhorn/icon/color/longhorn-icon-color.png
@@ -25,4 +25,4 @@
 - https://github.com/longhorn/longhorn-ui
 - https://github.com/longhorn/longhorn-tests
 - https://github.com/longhorn/backing-image-manager
-version: 1.8.1
+version: 1.9.0