DevOps: Fix json query in reading the docker names to filter out fiel… #1623

Job	Run time
build-amd64 / linux/amd64	2m 9s
test-amd64 (aiida-core-with-services) / test	1m 19s
test-amd64 (aiida-core-base) / test	1m 26s
test-amd64 (aiida-core-dev) / test	2m 3s
build / linux/amd64,linux/arm64	11m 20s
test-arm64 / test	3m 22s
publish-ghcr / release (aiida-core-base)	13s
publish-ghcr / release (aiida-core-with-services)	8s
publish-ghcr / release (aiida-core-dev)	6s
publish-dockerhub / release (aiida-core-base)	30s
publish-dockerhub / release (aiida-core-with-services)	34s
publish-dockerhub / release (aiida-core-dev)	33s
	23m 43s

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