RFR: clarify how to set the affects versions

[calnan]

On Thu, 15 Feb 2024 00:04:17 GMT, calnan <duke at openjdk.org> wrote:

> moved together information on how the set the affects version and the meaning of the (Rel)-na and (Rel)-wnf labelss

Magnus - let me play around with Mermaid a bit - I did not have luck with an initial attempt to have the diagram in mermaid. It may be the structure of the diagram needs to be rethought in order for it it be possible to do with mermaid

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PR Comment: https://git.openjdk.org/guide/pull/119#issuecomment-1954735426