Missing `f` prefix on f-strings
Some strings looks like they're meant to be f-strings but are missing the `f` prefix meaning variable interpolation won't happen.

https://github.com/huggingface/transformers/blob/d91841315aab55cf1347f4eb59332858525fad0f/src/transformers/utils/hub.py#L751
https://github.com/huggingface/transformers/blob/d91841315aab55cf1347f4eb59332858525fad0f/src/transformers/configuration_utils.py#L637
https://github.com/huggingface/transformers/blob/d91841315aab55cf1347f4eb59332858525fad0f/src/transformers/pipelines/audio_utils.py#L58
https://github.com/huggingface/transformers/blob/d91841315aab55cf1347f4eb59332858525fad0f/src/transformers/pipelines/audio_utils.py#L147
https://github.com/huggingface/transformers/blob/d91841315aab55cf1347f4eb59332858525fad0f/src/transformers/models/auto/feature_extraction_auto.py#L310
https://github.com/huggingface/transformers/blob/d91841315aab55cf1347f4eb59332858525fad0f/src/transformers/models/xglm/modeling_flax_xglm.py#L156
https://github.com/huggingface/transformers/blob/d91841315aab55cf1347f4eb59332858525fad0f/src/transformers/models/plbart/modeling_plbart.py#L1025
https://github.com/huggingface/transformers/blob/d91841315aab55cf1347f4eb59332858525fad0f/src/transformers/models/bert/convert_bert_original_tf2_checkpoint_to_pytorch.py#L132
https://github.com/huggingface/transformers/blob/d91841315aab55cf1347f4eb59332858525fad0f/src/transformers/models/bart/modeling_bart.py#L1053
https://github.com/huggingface/transformers/blob/d91841315aab55cf1347f4eb59332858525fad0f/src/transformers/models/prophetnet/modeling_prophetnet.py#L760
https://github.com/huggingface/transformers/blob/d91841315aab55cf1347f4eb59332858525fad0f/tests/extended/test_trainer_ext.py#L269
https://github.com/huggingface/transformers/blob/d91841315aab55cf1347f4eb59332858525fad0f/examples/research_projects/onnx/summarization/bart_onnx/generation_onnx.py#L642

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