Bump helm chart versions post 2.8 release

Change-Id: Iacded169e9193dce471ca2099fd1dc817e6bf58b
diff --git a/voltha-infra/Chart.yaml b/voltha-infra/Chart.yaml
index b393234..1a3ed23 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"
-version: 0.2.8
+appVersion: "2.9-dev"
+version: 0.3.0
 
 dependencies:
   - name: onos-classic