Bump sphinx-autodoc-typehints from 1.25.2 to 2.4.4 #1120

Job	Run time
prepare	5s
tests (avalanche-er.json) / run	4m 15s
tests (avalanche-ewc.json) / run	4m 43s
tests (avalanche-icarl.json) / run	3m 25s
tests (avalanche-lwf.json) / run	3m 9s
tests (der.json) / run	5m 9s
tests (cls-er.json) / run	3m 42s
tests (er.json) / run	4m 43s
tests (fine-tuning.json) / run	6m 13s
tests (gdumb.json) / run	3m 2s
tests (joint.json) / run	3m 53s
tests (offline-er.json) / run	4m 23s
tests (pod-er.json) / run	6m 14s
tests (super-er.json) / run	4m 22s
	57m 18s

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