[jdk23u] RFR: 8335775: Remove extraneous 's' in comment of rawmonitor.cpp test file

[Andrew John Hughes]

Clean backport to fix a typo (an errant 's') in `test/hotspot/jtreg/vmTestbase/nsk/jvmti/unit/functions/rawmonitor/rawmonitor.cpp` introduced by [JDK-8299635](https://bugs.openjdk.org/browse/JDK-8299635)

This was spotted by George Adams (@gdams) when backporting 8299635 to 17u, where it is now needed to support builds on newer versions of Mac OS. It's a trivial fix it makes sense to clean up everywhere.

This pull request contains a backport of commit [ff49f677](https://github.com/openjdk/jdk/commit/ff49f677ee5017019c90823bc412ceb90068ffbd) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository.

The commit being backported was authored by Severin Gehwolf on 5 Jul 2024 and was reviewed by George Adams and Thomas Stuefe.

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Commit messages:
 - Backport ff49f677ee5017019c90823bc412ceb90068ffbd

Changes: https://git.openjdk.org/jdk23u/pull/15/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk23u&pr=15&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8335775
  Stats: 1 line in 1 file changed: 0 ins; 1 del; 0 mod
  Patch: https://git.openjdk.org/jdk23u/pull/15.diff
  Fetch: git fetch https://git.openjdk.org/jdk23u.git pull/15/head:pull/15

PR: https://git.openjdk.org/jdk23u/pull/15