Update capi-helm-openstack-cluster to 0.3.1 (#359)

Co-authored-by: mkjpryor <mkjpryor@users.noreply.github.com>

Author: azimuth-ci-bot[bot]

roles/capi_cluster/defaults/main.yml

@@ -3,7 +3,7 @@
 # The chart to use
 capi_cluster_chart_repo: https://stackhpc.github.io/capi-helm-charts
 capi_cluster_chart_name: openstack-cluster
-capi_cluster_chart_version: 0.3.0
+capi_cluster_chart_version: 0.3.1
 
 # Release information for the cluster release
 capi_cluster_release_namespace: default