MCO Clarity in Custom Config Application RN

[mburke5678]

Release note retroactively added to announce the change in documented https://github.com/openshift/openshift-docs/pull/95297.

Preview: OCP 4.15 Release Notes -> Notable technical changes -- MCO gives priority to custom machine config changes

The note is being added to the 4.15 release notes; as such change management is needed. Change mangement:

• [ ] Michelle Krejci -- Manager
• [ ] Mark Russell -- PM
• [ ] Derrick Ornelas -- PX
• [x] Sergio Regidor de la Rosa -- QE (approval in initial PR)
• [x] Jerry Zhang -- Eng (approval in initial PR)
• [ ] Kathryn Alexander -- Docs

[ocpdocs-previewbot]

🤖 Mon Jul 07 17:16:23 - Prow CI generated the docs preview:

https://95451--ocpdocs-pr.netlify.app/openshift-enterprise/latest/release_notes/ocp-4-15-release-notes.html

[control-d]

lgtm

[openshift-ci[bot]]

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[cbippley]

/label peer-review-in-progress /remove-label peer-review-needed

[cbippley]

/label peer-review-done /remove-label peer-review-in-progress