Bump docker/setup-buildx-action from 3.0.0 to 3.1.0 #8366

Job	Run time
Build, test and upload wheel	1m 19s
Framework / bare	2m 41s
Strategy / FedMedian	1m 31s
Framework / bare-https	1m 12s
Strategy / FedTrimmedAvg	1m 18s
Framework / jax	1m 53s
Strategy / QFedAvg	1m 14s
Framework / pytorch	2m 45s
Strategy / FaultTolerantFedAvg	1m 19s
Framework / tensorflow	3m 14s
Strategy / FedAvgM	1m 17s
Framework / tabnet	2m 53s
Strategy / FedAdam	1m 21s
Framework / opacus	2m 58s
Strategy / FedAdagrad	1m 18s
Framework / pytorch-lightning	2m 33s
Strategy / FedYogi	1m 19s
Framework / scikit-learn	2m 28s
Framework / fastai	4m 18s
Framework / pandas	1m 45s
	40m 36s

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