Add CAPO version to github issue template

Since we released some versions, we should know CAPO version from bug
report. This commit adds CAPO version to github issue bug template.

Author: hidekazuna

.github/ISSUE_TEMPLATE/bug_report.md

@@ -19,7 +19,8 @@ about: Tell us about a problem you are experiencing
 
 **Environment:**
 
-- Cluster-api version:
+- Cluster API Provider OpenStack version (Or `git rev-parse HEAD` if manually built):
+- Cluster-API version:
 - Minikube/KIND version:
-- Kubernetes version: (use `kubectl version`):
+- Kubernetes version (use `kubectl version`):
 - OS (e.g. from `/etc/os-release`):