RFR: 8300011: Refactor code examples to use @snippet in java.util.TimeZone [v4]

[Justin Lu]

> This PR implements JEP 413: Code Snippets in Java API Documentation for _[java.util.TimeZone](https://docs.oracle.com/en/java/javase/19/docs/api/java.base/java/util/TimeZone.html)_.
> 
> Code examples using <pre> ...  </pre> blocks are replaced with the @ snippet syntax where applicable.

Justin Lu has updated the pull request incrementally with one additional commit since the last revision:

  Add trailing ; to code examples

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/11955/files
  - new: https://git.openjdk.org/jdk/pull/11955/files/a2f57899..1e9fee12

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=11955&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=11955&range=02-03

  Stats: 3 lines in 1 file changed: 0 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/11955.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/11955/head:pull/11955

PR: https://git.openjdk.org/jdk/pull/11955