The OwlBot CLI's copy-code image SHA should be automatically updated by renovate-bot

[diegomarquezp]

Follow up of #2252

sdk-platform-java/library_generation/configuration/owlbot-cli-sha

Lines 1 to 2 in 6c4c236

	# owlbot-cli image from 20231010
	sha256:623647ee79ac605858d09e60c1382a716c125fb776f69301b72de1cd35d49409

Uses a hardcode image SHA that has to be manually updated. We need to find out whether it's possible to have renovate-bot to update it.

cc: @blakeli0

[suztomo]

I wouldn't spend too much time on this. I've never encountered the need of updating OwlBot CLI. The maintainers don't actively add new features there now.