Fix attribute error with deprecated stage discovery (#1107)

* Fix attribute error

* Follow typing

Author: Middledot

discord/enums.py

@@ -615,7 +615,7 @@ class ApplicationType(Enum):
 
 
 class StagePrivacyLevel(Enum):
-    # public = 1 Deprecated
+    # public = 1 (deprecated)
     closed = 2
     guild_only = 2
 

discord/stage_instance.py

@@ -109,7 +109,7 @@ def channel(self) -> Optional[StageChannel]:
         return self._state.get_channel(self.channel_id)  # type: ignore
 
     def is_public(self) -> bool:
-        return self.privacy_level is StagePrivacyLevel.public
+        return False
 
     async def edit(
         self,