[FIX] Document Question Answer warning with Donut model
# What does this PR do?

Currently if you try to use the Document Question Answering pipeline with Donut model a warning is thrown telling that the model is not supported. However, the model appears as supported in the documentation.

Reviewers:

Models:

- donut: @NielsRogge 

Library:

- pipelines: @ankrgyl 


_The documentation is not available anymore as the PR was closed or merged._<|||||>Hi there @WaterKnight1998, we have an open PR (https://github.com/huggingface/transformers/pull/19027) that aims to solve this problem. I believe @NielsRogge and team prefer not to include `donut-swin` in the list of `AutoModelForDocumentQuestionAnswering`. @NielsRogge would you mind clarifying?<|||||>Closing this as it's fixed by #19027 