Use busybox:1.28 instead of busybox:1.26

[nitkon]

Use multi-arch busybox:1.28 image instead of busybox:1.26

Signed-off-by: Nitesh Konkar [email protected]

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[Random-Liu]

@nitkon Please sign the CLA.

The change LGTM.

[nitkon]

@Random-Liu : I have now signed the CLA.

[feiskyer]

/lgtm

thanks