Fix sticker URL for GIF stickers

discord/sticker.py

@@ -299,6 +299,9 @@ class Sticker(_StickerTag):
         self.name: str = data['name']
         self.description: str = data['description']
         self.format: StickerFormatType = try_enum(StickerFormatType, data['format_type'])
+        if self.format is StickerFormatType.gif:
+            self.url: str = f'https://media.discordapp.net/stickers/{self.id}.gif'
+        else:
             self.url: str = f'{Asset.BASE}/stickers/{self.id}.{self.format.file_extension}'
 
     def __repr__(self) -> str: