RFR: 8267691: Change table to obsolete CriticalJNINatives in JDK 18, not 17

[Coleen Phillimore]

Fix the table to obsolete the option in the next release, when there'll be more Panama.
Tested with tier1 in progress.

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Commit messages:
 - 8267691: Change table to obsolete CriticalJNINatives in JDK 18, not 17

Changes: https://git.openjdk.java.net/jdk/pull/4185/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=4185&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8267691
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/4185.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/4185/head:pull/4185

PR: https://git.openjdk.java.net/jdk/pull/4185