Update type hint

src/palace/manager/sqlalchemy/model/licensing.py

@@ -13,7 +13,6 @@
 from sqlalchemy.orm import Mapped, relationship
 from sqlalchemy.orm.session import Session
 from sqlalchemy.sql.expression import or_
-from typing_extensions import Self
 
 from palace.manager.core.exceptions import BasePalaceException
 from palace.manager.sqlalchemy.constants import (
@@ -47,7 +46,7 @@ class LicenseStatus(PythonEnum):
     unavailable = "unavailable"
 
     @classmethod
-    def get(cls, value: str | None) -> Self:
+    def get(cls, value: str | None) -> LicenseStatus:
         if value is None:
             return cls.unavailable
         return cls.__members__.get(value.lower(), cls.unavailable)