Fix helm lint check

Change-Id: I7759cbabdbae8266adf4f285221c7c5dbb089ad0
diff --git a/apps/dbuf/Chart.yaml b/apps/dbuf/Chart.yaml
index a644fae..7483562 100644
--- a/apps/dbuf/Chart.yaml
+++ b/apps/dbuf/Chart.yaml
@@ -1,7 +1,7 @@
 # Copyright 2021-present Open Networking Foundation
 # SPDX-License-Identifier: LicenseRef-ONF-Member-Only-1.0
 
-apiVersion: v1
+apiVersion: v2
 name: dbuf
 description: A Helm chart deploying DBUF
 
@@ -18,7 +18,7 @@
 # This is the chart version. This version number should be incremented each time you make changes
 # to the chart and its templates, including the app version.
 # Versions are expected to follow Semantic Versioning (https://semver.org/)
-version: 0.1.2
+version: 0.1.3
 
 # This is the version number of the application being deployed. This version number should be
 # incremented each time you make changes to the application. Versions are not expected to