Bump actions/cache from 3 to 4 #1884

Job	Run time
python 3.9 - Lint	2m 23s
python 3.9 - Type check	4m 52s
python 3.9 - Build	2m 29s
python 3.9 - Style	16s
python 3.9 - Docs	2m 50s
GPU Tests	22m 35s
python 3.9 - Test	2m 56s
python 3.9 - Datasets integration	23s
python 3.9 - PyTorch integration	34s
python 3.9 - Transformers integration	2m 53s
python 3.9 - FairScale integration	34s
python 3.9 - W&B integration	6m 45s
python 3.9 - Beaker integration	10m 5s
python 3.9 - Flax integration	4m 27s
python 3.9 - GS integration	1m 3s
python 3.9 - Example - train_lm	2m 50s
python 3.8 - Test	3m 41s
python 3.10 - Test	3m 17s
Release	0s
	1h 14m 53s

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