fix: use existing attribute in Dialog instance

[gurland]

If .get_dialogs() is used an error on Dialog parsing occurs. This PR changes the typo in raw.types.Dialog.unread_poll_votes_count attribute access.

The error Traceback:

in get_all_chats
    async for dialog in app.get_dialogs():
  File "/home/admin/Projects/telegram-delete-all-messages/.venv/lib/python3.11/site-packages/pyrogram/methods/chats/get_dialogs.py", line 115, in get_dialogs
    parsed = types.Dialog._parse(self, dialog, messages, users, chats)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/admin/Projects/telegram-delete-all-messages/.venv/lib/python3.11/site-packages/pyrogram/types/user_and_chats/dialog.py", line 112, in _parse
    unread_poll_vote_count=dialog.unread_poll_vote_count,
                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'Dialog' object has no attribute 'unread_poll_vote_count'. Did you mean: 'unread_poll_votes_count'?

[gurland]

@SpEcHiDe could you please release the upstream version? I really need that patch to be installable by users of my tool from PyPI and I heavily rely on .get_dialogs() method.

[SpEcHiDe]

I was trying to implement the new layer changes in ( #239 ) and postpone releasing a new version, but I guess there are too many changes in the new layer.
I have pushed the 2.2.24 version now.