enable ci build for RX65X host example

update comment for unit not ready 3a-00 additional sense

examples/device/cdc_msc/src/msc_disk.c

@@ -142,6 +142,7 @@ bool tud_msc_test_unit_ready_cb(uint8_t lun)
 
   // RAM disk is ready until ejected
   if (ejected) {
+    // Additional Sense 3A-00 is NOT_FOUND
     tud_msc_set_sense(lun, SCSI_SENSE_NOT_READY, 0x3a, 0x00);
     return false;
   }