Update 111_fine_tune_whisper.ipynb

[Faith-Nchifor]

I included !pip install accelerate to tutorial. I did this because I encountered an error with the Seq2SeqTrainingArguments that required accelerate.

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[sanchit-gandhi]

Sorry for the late reply @Faith-Nchifor! Many thanks for raising this issue and for the submitted PR. This was fixed as part of a batch of updates in #1944 - feel free to take a look!