RFR: 8341541: Wrong anchor in wrapper classes links

[Joe Darcy]

Fix broken links.

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Commit messages:
 - JDK-8341541: Wrong anchor in wrapper classes links

Changes: https://git.openjdk.org/jdk/pull/21360/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=21360&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8341541
  Stats: 3 lines in 2 files changed: 0 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/21360.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21360/head:pull/21360

PR: https://git.openjdk.org/jdk/pull/21360