Issue template: match with PR template

Add same notes about the list of available issue types

Author: 0xc0170

.github/issue_template.md

@@ -2,8 +2,10 @@
 
 <!-- 
     Required
-    Please add only one X to one of the following types. Do not fill multiple types (split the pull request otherwise) or
-    change the layout.
+    Please add only one X to one of the following types. Do not fill multiple types (split the issue otherwise)
+    Please note this is not a GitHub task list, indenting the boxes or changing the format to add a '.' or '*' in front
+    of them would change the meaning incorrectly. The only changes to be made are to add a description text under the
+    description heading and to add a 'x' to the correct box.
 
     [X] Question
     [ ] Enhancement