update rounding for step percent

Author: hcarter-775

drivers/SmartThings/matter-switch/src/switch_handlers/capability_handlers.lua

@@ -130,7 +130,7 @@ function CapabilityHandlers.handle_step_color_temperature_by_percent(driver, dev
   local step_mode = step_percent_change > 0 and (clusters.ColorControl.types.StepModeEnum.DOWN or 3) or (clusters.ColorControl.types.StepModeEnum.UP or 1)
   local min_mireds = switch_utils.get_field_for_endpoint(device, fields.COLOR_TEMP_BOUND_RECEIVED_MIRED..fields.COLOR_TEMP_MIN, endpoint_id) or 2200 -- default min mireds
   local max_mireds = switch_utils.get_field_for_endpoint(device, fields.COLOR_TEMP_BOUND_RECEIVED_MIRED..fields.COLOR_TEMP_MAX, endpoint_id) or 6500 -- default max mireds
-  local color_change_in_mireds = st_utils.round((max_mireds - min_mireds) * (math.abs(step_percent_change)/100))
+  local color_change_in_mireds = (max_mireds - min_mireds) * st_utils.round((math.abs(step_percent_change)/100))
   device:send(clusters.ColorControl.server.commands.StepColorTemperature(device, endpoint_id, step_mode, color_change_in_mireds, fields.TRANSITION_TIME, min_mireds, max_mireds, fields.OPTIONS_MASK, fields.OPTIONS_OVERRIDE))
 end