Update CONTRIBUTING.md

reproduce

Author: Vladimir Kotal

CONTRIBUTING.md

@@ -3,5 +3,7 @@ the general direction of the project, feel free to submit new Issue first and le
 
 Asking questions via creating new Issue is fine also.
 
+When submitting a new Issue for what seems is a bug, please note the version you're running and ideally steps to reproduce.
+
 For pull requests to be merged, we need contributors to get Oracle Contributor Agreement first.
 See http://www.oracle.com/technetwork/community/oca-486395.html for details.