Using latest vOLT image

Change-Id: I1b6a93d847a3dd34107e7649fcd333983444a7e5
diff --git a/xos-services/volt/Chart.yaml b/xos-services/volt/Chart.yaml
index 9348023..0a8dad1 100644
--- a/xos-services/volt/Chart.yaml
+++ b/xos-services/volt/Chart.yaml
@@ -17,5 +17,5 @@
 description: A Helm chart for XOS's "olt-service" service
 icon: https://guide.opencord.org/logos/cord.svg
 
-version: 2.1.7
-appVersion: 2.1.12
+version: 2.1.8
+appVersion: 2.1.13