foreman-documentation Add a note to inform user about LEAPP z-stream neutrality

What changes are you introducing?

Inform users that they can upgrade to EL 9 without having to update to the latest EL 8 release.

Why are you introducing these changes? (Explanation, links to references, issues, etc.)

Users can upgrade from EL 8 to EL 9 without having to upgrade to the latest EL 8 z-stream. Since this was not the case for earlier major version upgrades, it is necessary to bring it to the users' notice.

JIRA: https://issues.redhat.com/browse/SAT-38348

Specifically this comment: https://issues.redhat.com/browse/SAT-38348?focusedId=28411930&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-28411930

Contributor checklists

[x] I am okay with my commits getting squashed when you merge this PR.
[x] I am familiar with the contributing guidelines.

Please cherry-pick my commits into:

[ ] Foreman 3.17/Katello 4.19
[ ] Foreman 3.16/Katello 4.18 (Satellite 6.18)
[ ] Foreman 3.15/Katello 4.17
[ ] Foreman 3.14/Katello 4.16 (Satellite 6.17; orcharhino 7.4)
[ ] Foreman 3.13/Katello 4.15 (EL9 only)
[x] Foreman 3.12/Katello 4.14 (Satellite 6.16; orcharhino 7.2 on EL9 only; orcharhino 7.3)
[ ] Foreman 3.11/Katello 4.13 (orcharhino 6.11 on EL8 only; orcharhino 7.0 on EL8+EL9; orcharhino 7.1 with Leapp)
[ ] Foreman 3.10/Katello 4.12
[ ] Foreman 3.9/Katello 4.11 (Satellite 6.15; orcharhino 6.8/6.9/6.10)
We do not accept PRs for Foreman older than 3.9.

Summary by Sourcery

Documentation:

Add explanatory note that upgrading from EL 8 to EL 9 with LEAPP does not require updating to the latest EL 8 z-stream release.

Nov 26 '25 07:11 AkshayGadhaveRH

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

Adds documentation to the LEAPP in-place upgrade procedure clarifying that users can upgrade from EL 8 to EL 9 without first updating to the latest EL 8 z-stream release.

File-Level Changes

Change	Details	Files
Document LEAPP z-stream neutrality in the EL8→EL9 in-place upgrade procedure.	Insert a note into the LEAPP-based in-place upgrade procedure explaining that upgrading to EL 9 does not require updating to the latest EL 8 z-stream release. Clarify that this behavior differs from earlier major version upgrades and is specific to the EL8 to EL9 path.	`guides/common/modules/proc_upgrading-project-or-proxy-in-place-using-leapp.adoc`

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Nov 26 '25 07:11 sourcery-ai[bot]

The PR preview for a87d77d45bb8cd726a45681a024dba0a9423cb89 is available at theforeman-foreman-documentation-preview-pr-4504.surge.sh

The following output files are affected by this PR:

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Nov 26 '25 07:11 github-actions[bot]