add hb to bulk upload

app/services/bulk_upload/lettings/row_parser.rb

@@ -289,6 +289,7 @@ private
       referral: %i[field_78],
 
       net_income_known: %i[field_51],
+      hb: %i[field_48],
     }
   end
 
@@ -420,6 +421,7 @@ private
     attributes["referral"] = field_78
 
     attributes["net_income_known"] = field_51
+    attributes["hb"] = field_48
 
     attributes
   end

spec/services/bulk_upload/lettings/row_parser_spec.rb

@@ -118,6 +118,7 @@ RSpec.describe BulkUpload::Lettings::RowParser do
             field_78: "2",
 
             field_51: "1",
+            field_48: "1",
           }
         end