RFR: 8333586: Improve syntax of @see tags in javax.lang.model

[Joe Darcy]

Avoid using `<a href=..>` when alternative syntax will do.

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Commit messages:
 - Update copyright years.
 - JDK-8333586: Improve syntax of @see tags in javax.lang.mode

Changes: https://git.openjdk.org/jdk/pull/19552/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=19552&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8333586
  Stats: 104 lines in 36 files changed: 0 ins; 0 del; 104 mod
  Patch: https://git.openjdk.org/jdk/pull/19552.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/19552/head:pull/19552

PR: https://git.openjdk.org/jdk/pull/19552