Bump sphinx from 5.3.0 to 7.3.7 #1878

Job	Run time
python 3.9 - Lint	1m 14s
python 3.9 - Type check	1m 8s
python 3.9 - Build	1m 9s
python 3.9 - Style	17s
python 3.9 - Docs	1m 11s
python 3.9 - Test	17s
python 3.9 - Datasets integration	16s
python 3.9 - PyTorch integration	34s
GPU Tests	24m 9s
python 3.9 - Transformers integration	1m 11s
python 3.9 - FairScale integration	46s
python 3.9 - W&B integration	1m 18s
python 3.9 - Beaker integration	17s
python 3.9 - Flax integration	51s
python 3.9 - GS integration	23s
python 3.9 - Example - train_lm	1m 10s
python 3.8 - Test	16s
python 3.10 - Test	20s
Release	0s
	36m 47s

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