RFR: 8338760: Adjust the comment after UseObjectMonitorTable

[Hamlin Li]

Hi,
Can you help to review this simple comment change?
After reading description and code of https://github.com/openjdk/jdk/pull/20067, seems to me this comment should be changed accordingly. But I could be wrong. 
Thanks

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Commit messages:
 - fix

Changes: https://git.openjdk.org/jdk/pull/20663/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=20663&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8338760
  Stats: 2 lines in 1 file changed: 1 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/20663.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/20663/head:pull/20663

PR: https://git.openjdk.org/jdk/pull/20663