VOL-4233: Update component version in voltha-helm-charts

Change-Id: I9558632f1cbc1fc426adcc4cfea00b3a764e47f7
diff --git a/voltha-infra/Chart.yaml b/voltha-infra/Chart.yaml
index 337022f..b393234 100644
--- a/voltha-infra/Chart.yaml
+++ b/voltha-infra/Chart.yaml
@@ -28,8 +28,8 @@
     url: "https://www.opennetworking.org"
 name: voltha-infra
 
-appVersion: "2.8-dev"
-version: 0.2.7
+appVersion: "2.8"
+version: 0.2.8
 
 dependencies:
   - name: onos-classic