RFR: 8357458: Missing Highlight.js license file [v2]

[Hannes Wallnöfer]

> Please review a change to add the missing license file for Highlight.js required for the `--syntax-highlight` option. This also updates the tests for legal files and library versions to handle the file correctly.

Hannes Wallnöfer has updated the pull request incrementally with one additional commit since the last revision:

  Capitalize license heading

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Changes:
  - all: https://git.openjdk.org/jdk/pull/25352/files
  - new: https://git.openjdk.org/jdk/pull/25352/files/d4a66674..79427e74

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=25352&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=25352&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/25352.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/25352/head:pull/25352

PR: https://git.openjdk.org/jdk/pull/25352