fix: update chart version to 0.0.9-alpha

Author: yutianqin

helm/rexec/Chart.yaml

@@ -2,7 +2,7 @@ apiVersion: v2
 name: rexec-stack
 description: Deploy the SciDx Rexec broker, rexec server deployment API, and NDP Endpoint API.
 type: application
-version: 0.0.9-5
+version: 0.0.9-alpha
 appVersion: "0.1.0"
 dependencies:
   - name: rexec-broker