Update design-task.md

.gitlab/issue_templates/design-task.md

-## Design task to do?
+# What needs to be done?
 
-(Description)
+* step
+* step
+* step
 
+# Remember also?
 
+* askel
+* askel
+* askel
+* 
 
+# Who is responsible?
 
-## Links to other tasks/features?
 
+# Links & Sources
 
-(documentation?)
-
-/label ~Design
\ No newline at end of file
+/label ~Design
+/lable ~Backlog
\ No newline at end of file