[CI-SKIP] Add newlines in templates for readability

GitHub still just dumps people into an editor. It's not quite the forms
we hoped for. Better to add newlines and hope it makes things even a
tiny bit clearer for people reporting issues.

.github/ISSUE_TEMPLATE/server-crash---stacktrace.md

@@ -7,6 +7,7 @@ about: Report server crashes and/or scary stacktraces
 ### Link/paste of stack trace
 
     You can also simply just use code formatting in markdown!
+
 ___We need all of the stack trace! Do not cut off parts of it.___
 
 ### Plugin list: