RFR: 8349121: SSLParameters.setApplicationProtocols() ALPN example could be clarified [v3]

[Bradford Wetmore]

> Update and clarify the sample code.
> 
> Docs only, no additional testing other than verifying javadoc is correctly output.

Bradford Wetmore has updated the pull request incrementally with one additional commit since the last revision:

  Codereview Comments

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Changes:
  - all: https://git.openjdk.org/jdk/pull/23379/files
  - new: https://git.openjdk.org/jdk/pull/23379/files/e5da45c1..61345a63

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=23379&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=23379&range=01-02

  Stats: 2 lines in 1 file changed: 1 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/23379.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/23379/head:pull/23379

PR: https://git.openjdk.org/jdk/pull/23379