roc-umbrella: releasing 1.4.64 for roc-gui v0.8.15

Change-Id: I14ed27414efd5e74bbb08db5c2e462019da4b17f
diff --git a/aether-roc-gui-v4/values.yaml b/aether-roc-gui-v4/values.yaml
index 05ca291..d8f3f75 100644
--- a/aether-roc-gui-v4/values.yaml
+++ b/aether-roc-gui-v4/values.yaml
@@ -10,7 +10,7 @@
 
 image:
   repository: onosproject/aether-roc-gui
-  tag: v0.8.14
+  tag: v0.8.15
   pullPolicy: IfNotPresent
   pullSecrets: []