[VOL-5506] Enable grpc stats

Change-Id: I106d78d29a637065aca3d825164ec2ae6ff84003
Signed-off-by: Abhay Kumar <abhay.kumar@radisys.com>
diff --git a/voltha/Chart.yaml b/voltha/Chart.yaml
index 030cc87..67d77ee 100644
--- a/voltha/Chart.yaml
+++ b/voltha/Chart.yaml
@@ -17,7 +17,7 @@
 
 ## Chart version for package 'voltha'
 ##   Increment when Chart.yaml changes
-version: "2.15.2"
+version: "2.15.3"
 
 description: "A Helm chart for Voltha based on K8S resources in Voltha project"
 keywords:
@@ -36,6 +36,6 @@
     url: "https://www.opennetworking.org"
 
 # appVersion refers to release version of voltha-go
-appVersion: "3.6.20"
+appVersion: "3.7.4"
 
 # [EOF]