clarify "your environment" section is for bugs

Author: erizocosmico

ISSUE_TEMPLATE.md

@@ -25,7 +25,7 @@ Please search on the [issue track](../) before creating one.
 <!--- How has this issue affected you? What are you trying to accomplish? -->
 <!--- Providing context helps us come up with a solution that is most useful in the real world -->
 
-## Your Environment
+## Your Environment (for bugs)
 <!--- Include as many relevant details about the environment you experienced the bug in -->
 * Version used:
 * Operating System and version: