Add release note for TLS secured metrics ports

[jab-rh]

• https://issues.redhat.com/browse/OSDOCS-9440

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• [ ] QE has approved this change.

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[ocpdocs-previewbot]

🤖 Tue Mar 26 02:43:57 - Prow CI generated the docs preview: https://73718--ocpdocs-pr.netlify.app

[openshift-ci[bot]]

@jab-rh: all tests passed!

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