Improve textation around the Breaking change to zOSMF LTPA token

[balhar-jakub]

Describe your pull request here:
Specify more clearly intent behind the specific z/OSMF versions.

List the file(s) included in this PR:
breaking-changes-v3.ms

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[github-actions]

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[github-actions]

🚀 Deployed on https://66f6a31b51454f3f369faa43--zowe-docs-master.netlify.app

[janan07]

Reviewed and edited by doc squad