RFR: 8347163: Javadoc error in ConstantPoolBuilder after JDK-8342468

[Chen Liang]

The anchor is `refkinds` instead of `refKinds`.

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Commit messages:
 - 8347163: Javadoc error in ConstantPoolBuilder after JDK-8342468

Changes: https://git.openjdk.org/jdk/pull/22961/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=22961&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8347163
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/22961.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/22961/head:pull/22961

PR: https://git.openjdk.org/jdk/pull/22961