boards: nxp: Update USB testing label to point to usb_next

The legacy USB device stack is not supported on this platform.

Signed-off-by: Mahesh Mahadevan <[email protected]>

Author: mmahadevan108

boards/nxp/mimxrt1180_evk/mimxrt1180_evk_mimxrt1189_cm33.yaml

@@ -27,6 +27,6 @@ supported:
   - dma
   - spi
   - watchdog
-  - usb_device
+  - usbd
   - sdhc
 vendor: nxp