Bump docker/build-push-action from 5 to 6 #80

Job	Run time
build-push	34m 15s
build-python-versions-matrix (3.8, linux/amd64)	4m 10s
build-python-versions-matrix (3.8, linux/arm64)	35m 23s
build-python-versions-matrix (3.9, linux/amd64)	4m 27s
build-python-versions-matrix (3.9, linux/arm64)	34m 49s
build-python-versions-matrix (3.10, linux/amd64)	3m 57s
build-python-versions-matrix (3.10, linux/arm64)	32m 45s
build-python-versions-matrix (3.11, linux/amd64)	4m 7s
build-python-versions-matrix (3.11, linux/arm64)	32m 15s
build-python-versions-matrix (3.12, linux/amd64)	4m 8s
build-python-versions-matrix (3.12, linux/arm64)	34m 3s
mirror-dockerhub	0s
	3h 44m 19s

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