[jfx17u] RFR: 8273732: Clarify review policies for clean backports in JavaFX update releases

[Kevin Rushforth]

Added a paragraph indicating that a review of a clean backport to an update release is optional, if the bug in question has been approved for inclusion into the release.

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Commit messages:
 - 8273732: Clarify review policies for clean backports in JavaFX update releases

Changes: https://git.openjdk.java.net/jfx17u/pull/9/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jfx17u&pr=9&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8273732
  Stats: 5 lines in 1 file changed: 4 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jfx17u/pull/9.diff
  Fetch: git fetch https://git.openjdk.java.net/jfx17u pull/9/head:pull/9

PR: https://git.openjdk.java.net/jfx17u/pull/9