Bump chart version of omec-control-plane and grafana-aether to satisfy version linter

Change-Id: Ic1da6bc754851aed0196c92f287fc1bda14601bf
diff --git a/monitoring/grafana-aether/Chart.yaml b/monitoring/grafana-aether/Chart.yaml
index a6c878e..3cb4b73 100644
--- a/monitoring/grafana-aether/Chart.yaml
+++ b/monitoring/grafana-aether/Chart.yaml
@@ -5,6 +5,6 @@
 name: grafana-aether
 description: A Helm chart for deploying Grafana with Aether dashboards
 
-version: 0.2.0
+version: 0.2.1
 
 appVersion: 0.1.0