<i18n dev> [jdk17] RFR: 8269513: Clarify the spec wrt `useOldISOCodes` system property [v4]

[Naoto Sato]

> Please review this small doc change to the system property. Accompanying CSR has also been created.

Naoto Sato has updated the pull request incrementally with one additional commit since the last revision:

  Missed one.

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Changes:
  - all: https://git.openjdk.java.net/jdk17/pull/163/files
  - new: https://git.openjdk.java.net/jdk17/pull/163/files/da119219..3b6ff65d

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk17&pr=163&range=03
 - incr: https://webrevs.openjdk.java.net/?repo=jdk17&pr=163&range=02-03

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk17/pull/163.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk17 pull/163/head:pull/163

PR: https://git.openjdk.java.net/jdk17/pull/163