Backport #37324 by @lunny
A quick fix#37317
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The current behavior for forks when an organization or repository is
changed to private differs from GitHub.
On GitHub, when a parent repository becomes private, the fork
relationship is removed, which keeps the behavior simple and avoids
visibility conflicts.
I think we need a similar solution to handle cases where the parent
repository becomes private while a fork remains public and the fork
relationship is still preserved.
Signed-off-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: silverwind <me@silverwind.io>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
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