Update discord/ui/media_gallery.py

Co-authored-by: Paillat <jeremiecotti@ik.me>
Signed-off-by: Nelo <41271523+NeloBlivion@users.noreply.github.com>

Author: NeloBlivion

discord/ui/media_gallery.py

@@ -168,7 +168,7 @@ def replace_item(self, index: int, new_item: MediaGalleryItem) -> Self:
 
         Parameters
         ----------
-        original_item: :class:`int`
+        index: :class:`int`
             The index of the item to replace in this gallery.
         new_item: :class:`MediaGalleryItem`
             The new item to insert into the gallery.