Update supported-capabilities-by-platform.md

[vboyev-MSFT]

Added footnote to show that TVM is not supported on Rocky or Alma at this point in time.

[learn-build-service-prod]

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[denisebmsft]

Thank you @vboyev-MSFT

[learn-build-service-prod]

Learn Build status updates of commit 50c2185:

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[learn-build-service-prod]

Learn Build status updates of commit 1c4bfd8:

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