Added blood as a switchable mode to smartfridge boards (#3546)

Added blood as a switchable mode to smartfridge boards. It had
everything except that.

## Changelog

:cl:
fix: blood smart-fridge selectable on smartfridge boards now when
screwdrivering them.
/:cl:

code/game/objects/items/circuitboards/machine_circuitboards.dm

@@ -571,6 +571,7 @@
 		/obj/machinery/smartfridge/food = "food",
 		/obj/machinery/smartfridge/drinks = "drinks",
 		/obj/machinery/smartfridge/extract = "slimes",
+		/obj/machinery/smartfridge/bloodbank = "blood",
 		/obj/machinery/smartfridge/organ = "organs",
 		/obj/machinery/smartfridge/chemistry = "chems",
 		/obj/machinery/smartfridge/chemistry/virology = "viruses",