[jdk23] RFR: 8334162: Gatherer.defaultCombiner has an erronous @see-link

[Viktor Klang]

Making sure that the Javadoc is correct for Gatherer

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Commit messages:
 - Backport cff048c7354dd947a3946d262f4752a55b7e2a43

Changes: https://git.openjdk.org/jdk/pull/19704/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=19704&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8334162
  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/19704.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/19704/head:pull/19704

PR: https://git.openjdk.org/jdk/pull/19704