OSDOCS-18572:adds RHEL 9.8 notes to install docs

[tedaveryredhat]

Version(s):
4.22

Issue:
https://redhat.atlassian.net/browse/OSDOCS-18572

Link to docs preview:

QE review:

• QE has approved this change.

[openshift-ci-robot]

@tedaveryredhat: This pull request references OSDOCS-18572 which is a valid jira issue.

Warning: The referenced jira issue has an invalid target version for the target branch this PR targets: expected the story to target either version "4.22." or "openshift-4.22.", but it targets "openshift-4.21" instead.

Details

In response to this:

Version(s):
4.22

Issue:
https://redhat.atlassian.net/browse/OSDOCS-18572

Link to docs preview:

QE review:

• QE has approved this change.

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[ocpdocs-previewbot]

🤖 Thu Mar 19 18:40:26 - Prow CI generated the docs preview:

https://108730--ocpdocs-pr.netlify.app/microshift/latest/microshift_updating/microshift-update-rpms-ostree.html

[openshift-ci]

@tedaveryredhat: all tests passed!

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