[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/behavior-bug---plugin-incompatibility.md

@@ -9,6 +9,7 @@ ___What you expected to see___
 
 ### What behaviour is observed:
 ___What you actually saw___
+
 ### Steps/models to reproduce:
 ___This may include a build schematic, a video, or detailed instructions to help reconstruct the issue___