AETHER-3341 bump versions for aether-2.1 development

Change-Id: I91b24967f6369de1f0abd0a13be020fadbbd8d96
diff --git a/aether-roc-api/Chart.yaml b/aether-roc-api/Chart.yaml
index 3a7998e..6c4f946 100644
--- a/aether-roc-api/Chart.yaml
+++ b/aether-roc-api/Chart.yaml
@@ -7,7 +7,7 @@
 description: Aether ROC API
 kubeVersion: ">=1.15.0"
 type: application
-version: 1.5.0
+version: 1.6.0
 appVersion: v0.10.0
 keywords:
   - aether