feat: add additional requirements section to the user-story issue template

Author: José Postiga

.github/ISSUE_TEMPLATE/user-story.md

@@ -18,3 +18,7 @@ Sum the changes involved.
 **Database and schema information**
 
 Does this change require any schema changes to the database? If yes, describe it in detail.
+
+**Additional requirements**
+
+Does this change require any special attention or any additional notes for the development of this story?