Changes

After the release of [[N505]], we received some feedback from customers: the most important point is that N505 does not support fixed 2280 SSD, so we released N506 in time. In N506, we responded to and solved some problems raised by customers, such as we add position hole for the Recovery KEY & MaskROM key button to facilitate use these two function key, and we also enlarged the case to accommodate the entire NVME 2280 ssd, and the SSD can be fixed on the casing. In addition, we also added an aluminum radiator for orange pi 5B shield.