Update data/fields/house.json

Co-authored-by: Mateusz Konieczny <matkoniecz@gmail.com>

Author: Dimitar5555

data/fields/house.json

@@ -26,7 +26,7 @@
             },
             "terrace": {
                 "title": "Row of Terraced Houses",
-                "description": "A row of houses that are attached to each other in a line"
+                "description": "A row of houses that are attached to each other in a line (mapping each house as a separate area is preferred)"
             },
             "terraced": {
                 "title": "Single Terraced House",