drivers: usb: usb_dc_nrfx: add usbd worker thread name.

I added a thread name to the usbd worker thread.

Signed-off-by: Mark Watson <mwatson@prosaris.ca>

Fixes: #43330
diff --git a/drivers/usb/device/usb_dc_nrfx.c b/drivers/usb/device/usb_dc_nrfx.c
index e336981..2da566e 100644
--- a/drivers/usb/device/usb_dc_nrfx.c
+++ b/drivers/usb/device/usb_dc_nrfx.c
@@ -1914,6 +1914,7 @@
 			   K_KERNEL_STACK_SIZEOF(usbd_work_queue_stack),
 			   CONFIG_SYSTEM_WORKQUEUE_PRIORITY, NULL);
 
+	k_thread_name_set(&usbd_work_queue.thread, "usbd_workq");
 	k_work_init(&ctx->usb_work, usbd_work_handler);
 
 	return 0;