Using released versions for VOLTHA-2.5

Change-Id: I6b2ebe96a45c4c16495ee8a9be011d194e9e47e7
diff --git a/voltha/Chart.yaml b/voltha/Chart.yaml
index 435a3ba..a786a97 100644
--- a/voltha/Chart.yaml
+++ b/voltha/Chart.yaml
@@ -14,7 +14,7 @@
 ---
 apiVersion: "v1"
 name: "voltha"
-version: "2.6.0"
+version: "2.6.1"
 description: "A Helm chart for Voltha based on K8S resources in Voltha project"
 keywords:
   - "onf"