RFR: clarify how to set the affects versions [v9]

[Roger Calnan]

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

Roger Calnan has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains ten commits:

 - merged in latest changes
 - updates from feedback
 - updates from feedback
 - updates from feedback
 - updates from feedback
 - updates from feedback
 - updates from feedback
 - updates from feedback
 - clarify how to set the affects versions

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Changes: https://git.openjdk.org/guide/pull/119/files
  Webrev: https://webrevs.openjdk.org/?repo=guide&pr=119&range=08
  Stats: 51 lines in 2 files changed: 43 ins; 1 del; 7 mod
  Patch: https://git.openjdk.org/guide/pull/119.diff
  Fetch: git fetch https://git.openjdk.org/guide.git pull/119/head:pull/119

PR: https://git.openjdk.org/guide/pull/119