bash5.2がリリースされてた。

自分用の栞

https://savannah.gnu.org/git/?group=bash
https://git.savannah.gnu.org/cgit/bash.git
https://git.savannah.gnu.org/cgit/bash.git/commit/?id=ec8113b9861375e4e17b3307372569d429dec814 ... bash5.2.patch15

GitBashもbash5.2対応済み、と、、、
※最近、gitforwindows.orgの最新化対応が早い、、、

$ bash --version
GNU bash, version 5.2.12(1)-release (x86_64-pc-msys)
Copyright (C) 2022 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>

This is free software; you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.