added provisioner line to bug_report

Author: Krish Chowdhary

.github/ISSUE_TEMPLATE/bug_report.md

@@ -22,6 +22,7 @@ If the matter is security related, please disclose it privately via https://kube
 **Environment**:
 
 - Kubernetes version (use `kubectl version`), please list client and server:
+- Provisoner name and version (provide the release tag or commit hash):
 - Cloud provider or hardware configuration:
 - OS (e.g: `cat /etc/os-release`):
 - Kernel (e.g. `uname -a`):