Automatically update Dockerhub description #569

Job	Run time
(ubuntu-latest, Py3.7, sk0.21.2, sk-only:true)	3m 16s
(ubuntu-latest, Py3.7, sk0.22.2, sk-only:true)	6m 46s
(ubuntu-latest, Py3.7, sk0.23.1, sk-only:true)	5m 39s
(ubuntu-latest, Py3.7, sk0.24, sk-only:true)	6m 33s
(ubuntu-latest, Py3.8, sk0.22.2, sk-only:true)	3m 36s
(ubuntu-latest, Py3.8, sk0.23.1, sk-only:true)	4m 31s
(ubuntu-latest, Py3.8, sk0.24, sk-only:true)	3m 52s
(ubuntu-20.04, Py3.6, sk0.18.2, sk-only:true)	58s
(ubuntu-20.04, Py3.6, sk0.19.2, sk-only:true)	56s
(ubuntu-20.04, Py3.6, sk0.20.2, sk-only:true)	52s
(ubuntu-20.04, Py3.6, sk0.21.2, sk-only:true)	50s
(ubuntu-20.04, Py3.6, sk0.22.2, sk-only:true)	55s
(ubuntu-20.04, Py3.6, sk0.23.1, sk-only:true)	1m 1s
(ubuntu-20.04, Py3.6, sk0.24, sk-only:true)	50s
(ubuntu-latest, Py3.8, sk0.23.1, sk-only:false)	9m 24s
(windows-latest, Py, sk0.24.*, sk-only:false)	11m 13s
	1h 1m 12s

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