Reformat multi_token_prediction with pyink

[bvandermoon]

Description

Reformat multi_token_prediction.py using pyink src/MaxText/layers/multi_token_prediction.py. No other changes

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[codecov]

Codecov Report

❌ Patch coverage is 69.29134% with 39 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
src/MaxText/layers/multi_token_prediction.py	69.29%	35 Missing and 4 partials ⚠️

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