add note about immutable secret issue

[kei01234kei]

Description

There has been an issue where immutable secrets aren't refreshed when they are recreated. I've added documentation to inform readers about this issue.
kubernetes/kubernetes#131589

Issue

Closes: #

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[kei01234kei]

/cc @wojtek-t

[kei01234kei]

I think his description is more appropriate. So I modified this PR.
#42359 (comment)