ci(deps): bump docker/metadata-action from 5 to 6 (#45) #37

Job	Run time
publish (pip-tools/2.7, pip-tools/2.7/Dockerfile, 2.7-pip-tools, python-tools-2.7-pip-tools) / build (ubuntu-24.04-arm, linux/arm64)	40s
publish (build/2.7, build/2.7/Dockerfile, 2.7-build, python-tools-2.7-build) / build (ubuntu-24.04, linux/amd64)	37s
publish (pip-tools/2.7, pip-tools/2.7/Dockerfile, 2.7-pip-tools, python-tools-2.7-pip-tools) / build (ubuntu-24.04, linux/amd64)	42s
publish (build/3.12, build/3.12/Dockerfile, 3.12-build, python-tools-3.12-build) / build (ubuntu-24.04-arm, linux/arm64)	43s
publish (build/3.12, build/3.12/Dockerfile, 3.12-build, python-tools-3.12-build) / build (ubuntu-24.04, linux/amd64)	47s
publish (build/2.7, build/2.7/Dockerfile, 2.7-build, python-tools-2.7-build) / build (ubuntu-24.04-arm, linux/arm64)	37s
publish (build/2.7, build/2.7/Dockerfile, 2.7-build, python-tools-2.7-build) / merge	18s
publish (pip-tools/2.7, pip-tools/2.7/Dockerfile, 2.7-pip-tools, python-tools-2.7-pip-tools) / merge	24s
publish (build/3.12, build/3.12/Dockerfile, 3.12-build, python-tools-3.12-build) / merge	32s
	5m 20s

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