[tlbuild] Github action fails for Solaris

[Norbert Preining]

Hi Andreas,

>   sh[4]: tree: not found [No such file or directory]

Thanks for spotting this, I have opened an issue with the GH action
provider:
	https://github.com/vmactions/solaris-vm/issues/41
since this is not our code, but the code from the github action.

Best regards

Norbert

--
PREINING Norbert                              https://www.preining.info
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