Slim down issue template appearance

Author: liggitt

.github/ISSUE_TEMPLATE.md

@@ -1,19 +1,17 @@
-## Version
-[provide output of the `$ openshift version` or `$ oc version` command]
+[provide a description of the issue]
 
-## Description
-
-## Steps To Reproduce
+##### Version
+[provide output of the `openshift version` or `oc version` command]
 
+##### Steps To Reproduce
 1. [step 1]
 2. [step 2]
 
-## Current Result
-
-## Expected Result
+##### Current Result
 
-## Additional Information
+##### Expected Result
 
+##### Additional Information
 [try to run `$ oadm diagnostics` command if possible]
 [if you are reporting issue related to builds, provide build logs with `BUILD_LOGLEVEL=5`]
 [consider attaching output of the `$ oc get all -o json -n <namespace>` command to the issue]