[OTHERS] Multiple ISOs released at one time

[elreydetoda]

Vendor
Offsec/Kali

Describe the issue/link to bug reported to vendor
Apparently there has been a new ISO created for the 2021.3, so now it is at 2021.3a. Don't have a process for selecting the higher semver version for that.

here is some of the output from a debug run of the scripts/new-kali.sh script which was failing ( run1 & run2 )

+ printf %s '{"vm_name":"elrey741/kali-linux_amd64","iso_url":"https://cdimage.kali.org/current/kali-linux-2021.3-installer-netinst-amd64.iso
kali-linux-2021.3a-installer-netinst-amd64.iso","iso_checksum":"e06c26b2de306b1f4c12d015daf0b8e72b19672ee26ee2a5f2b86b828477dc1d

as you can see, there is a reference to 2 different isos versions, separated by a newline. I believe this was what caused the encoding error with printf in the CI runs.

parse error: Invalid string: control characters from U+0000 through U+001F must be escaped at line 2, column 47

Additional context
Need to have it choose the highest semver version.