Update autowheelbarrow.lua

Changed the amount of days it takes to loop the program as when there are to many wheelbarrows it can take a few days to carry the wheelbarrow over to a stockpile resulting in a infinite loop. 

Changing to 7 days results in even kids reaching their destination with a wheelbarrow before the 7th day.

autowheelbarrow.lua

@@ -101,8 +101,8 @@ local function event_loop()
     if enabled then
         dfhack.println("Running autowheelbarrow.lua ")
         auto_wheelbarrows()
-        -- Check again in 1 days
-        repeatutil.scheduleUnlessAlreadyScheduled(GLOBAL_KEY, 1, "days", event_loop)
+        -- Check again in 7 days
+        repeatutil.scheduleUnlessAlreadyScheduled(GLOBAL_KEY, 7, "days", event_loop)
     end
 end