RFR: 8079167: Fix documentation for G1SATBBufferEnqueueingThresholdPercent == 0

[Thomas Schatzl]

Hi all,

  please review this change to the documentation of `G1SATBBufferEnqueueingThresholdPercent`: since
the filtering is necessary to facilitate termination (see comments in CR), we can't completely disable filtering and the text is just misleading.

Testing: local compilation

Thanks,
  Thomas

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Commit messages:
 - 8079167

Changes: https://git.openjdk.org/jdk/pull/19385/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=19385&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8079167
  Stats: 3 lines in 1 file changed: 0 ins; 1 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/19385.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/19385/head:pull/19385

PR: https://git.openjdk.org/jdk/pull/19385