Correct the order for classmethod and abstractmethod

Author: seankingyang

providers/base/bin/check_secure_boot_state.py

@@ -325,8 +325,8 @@ def get_secure_boot_state(self) -> Tuple[SecureBootState, Optional[str]]:
         """
         pass
 
-    @abstractmethod
     @classmethod
+    @abstractmethod
     def is_supported(cls) -> bool:
         """
         Check if this secure boot method is supported on the system.