RFR: clarify how to set the affects versions

[David Holmes]

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

src/guide/jbs-jdk-bug-system.md line 96:

> 94: ##### Usage of (Rel)-na Label
> 95: 
> 96: Labels of the form [12-na]{.jbs-label} or [18-na]{.jbs-label} should be used when a bug is not applicable to a more recent release family.

Suggestion:

Labels of the form [Rel-na]{.jbs-label} (e.g. [18-na]{.jbs-label}) should be used when a bug is not applicable to a more recent release family. For example, given:

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PR Review Comment: https://git.openjdk.org/guide/pull/119#discussion_r1495301982