fix: fix error Attachment is not JSON serializable (#983)

* fix: fix error ``Attachment`` is not JSON serializable

* Update interactions/api/models/message.py

Co-authored-by: EdVraz <88881326+EdVraz@users.noreply.github.com>

Author: Damego

interactions/api/models/message.py

@@ -888,7 +888,7 @@ async def edit(
             _attachments = [a._json for a in attachments]
 
         if not files or files is MISSING:
-            _files = self.attachments
+            _files = []
         elif isinstance(files, list):
             _files = [file._json_payload(id) for id, file in enumerate(files)]
         else: