RFR: JDK-8309934: Update GitHub Actions to use JDK 17 for building jtreg [v2]

[Christian Stein]

> Please review this change to use the pre-installed JDK 17 for building jtreg when running on GitHub Actions.

Christian Stein has updated the pull request incrementally with one additional commit since the last revision:

  Update action.yml

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Changes:
  - all: https://git.openjdk.org/jdk/pull/14448/files
  - new: https://git.openjdk.org/jdk/pull/14448/files/cc05a40e..431ce0c3

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=14448&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=14448&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/14448.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/14448/head:pull/14448

PR: https://git.openjdk.org/jdk/pull/14448