[jdk23] RFR: 8336036: Synthetic documentation for a record's equals is incorrect for floating-point types

[Chen Liang]

Please review this backport of #20129 to JDK 23, fixing the documentation Javadoc generates for the default object method implementations in user records about the comparison behavior for `float` and `double` values.

-------------

Commit messages:
 - Backport b3ef2a600cfec31723dc78fe552e9cf9976b0337

Changes: https://git.openjdk.org/jdk/pull/20147/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=20147&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8336036
  Stats: 13 lines in 2 files changed: 6 ins; 0 del; 7 mod
  Patch: https://git.openjdk.org/jdk/pull/20147.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/20147/head:pull/20147

PR: https://git.openjdk.org/jdk/pull/20147