Linux install script | added note about Python 3.12

[dbradish-microsoft]

[learn-build-service-prod[bot]]

Learn Build status updates of commit 9e3b306:

:white_check_mark: Validation status: passed

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[dbradish-microsoft]

@bebound / @jiasli , I'm closing this PR replacing this information with a link to the new Support lifecycle doc. We should maintain Python dependency information in one place. Please see PR 4355.