Add attestation and fix image README push to Docker Hub #221

Job	Run time
Get Oh My Zsh versions	1s
Build Zsh Docker images (master)	1s
Build Zsh Docker images (5.9)	1s
Build Zsh Docker images (5.8.1)	1s
Build Zsh Docker images (5.8)	1s
Build Zsh Docker images (5.7.1)	1s
Build Zsh Docker images (5.7)	1s
Build Zsh Docker images (5.6.2)	1s
Build Zsh Docker images (5.6.1)	1s
Build Zsh Docker images (5.6)	1s
Build Zsh Docker images (5.5.1)	1s
Build Zsh Docker images (5.5)	1s
Build Zsh Docker images (5.4.2)	1s
Build Zsh Docker images (5.4.1)	1s
Build Zsh Docker images (5.4)	1s
Build Zsh Docker images (5.3.1)	1s
Build Zsh Docker images (5.3)	1m 41s
Build Zsh Docker images (5.2)	1m 48s
Build Zsh Docker images (5.1.1)	1m 47s
Build Zsh Docker images (5.1)	1m 50s
Build Zsh Docker images (5.0.8)	1m 47s
Build Zsh Docker images (5.0.7)	1m 46s
Build Zsh Docker images (5.0.6)	1m 51s
Build Zsh Docker images (5.0.5)	1m 44s
Build Zsh Docker images (5.0.4)	1m 47s
Build Zsh Docker images (5.0.3)	1m 48s
Build Zsh Docker images (5.0.2)	1m 45s
Build Zsh Docker images (5.0.1)	1m 48s
Build Zsh Docker images (5.0.0)	1m 47s
Build Zsh Docker images (4.3.17)	1m 43s
Build Zsh Docker images (4.3.16)	1m 51s
Build Zsh Docker images (4.3.15)	1m 53s
Build Zsh Docker images (4.3.14)	1m 49s
Build Zsh Docker images (4.3.13)	1m 48s
Build Zsh Docker images (4.3.12)	1m 49s
Build Zsh Docker images (4.3.11)	1m 46s
Build Oh My Zsh Docker image (master)	1m 58s
update-image-readme	0s
	38m 2s

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