update SECURITY.md (#5377)

* update SECURITY.md

* add comment on bug report

* format

.github/ISSUE_TEMPLATE/bug-report.md

@@ -10,21 +10,27 @@ v    Before smashing the submit button please review the template.
 v    Please also ensure that this is not a duplicate issue :)  
 ☺ > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > >  -->
 
+<!--
+IMPORTANT: Prior to opening a bug report, check if it affects one of the core modules
+and if its elegible for a bug bounty on `SECURITY.md`. Bugs that are not submitted
+through the appropriate channels won't receive any bounty.
+ -->
+
 ## Summary of Bug
 
 <!-- Concisely describe the issue -->
 
 ## Version
 
-<!-- git commit hash -->
+<!-- git commit hash or release version -->
 
 ## Steps to Reproduce
 
-<!-- What commands in order should someone run to reproduce your problem -->
+<!-- What commands in order should someone run to reproduce your problem? -->
 
 ____
 
-#### For Admin Use
+## For Admin Use
 
 - [ ] Not duplicate issue
 - [ ] Appropriate labels applied