Bump appVersion to 2.4.0 for voltha-openolt-adapter

Change-Id: Id1bc4b2e75d44fcad6c8448b1f35781991bd4df7
diff --git a/voltha-adapter-openolt/Chart.yaml b/voltha-adapter-openolt/Chart.yaml
index 54f4d03..8ae22e9 100644
--- a/voltha-adapter-openolt/Chart.yaml
+++ b/voltha-adapter-openolt/Chart.yaml
@@ -17,5 +17,5 @@
 description: A Helm chart for Voltha OpenOLT Adapter
 icon: https://guide.opencord.org/logos/cord.svg
 
-version: 2.3.0
-appVersion: 2.3.21
+version: 2.4.0
+appVersion: 2.4.0