fix: improve forwards compatibility with spsdk 2.1+

spsdk recently switched to the python-native Enum library and renamed the `desc` method to `get_description` in the process.

pynitrokey/trussed/bootloader/lpc55.py

@@ -60,7 +60,10 @@ def path(self) -> str:
     @property
     def status(self) -> Tuple[int, str]:
         code = self.device.status_code
-        message = StatusCode.desc(code)
+        try:
+            message = StatusCode.get_description(code)
+        except AttributeError:
+            message = StatusCode.desc(code)
         return (code, message)
 
     def close(self) -> None: