RFR: GitHub Actions [v3]

[Jesper Wilhelmsson]

> Encouraging developers to enable GHA on their personal forks.

Jesper Wilhelmsson has updated the pull request incrementally with one additional commit since the last revision:

  reproduce locally

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

Changes:
  - all: https://git.openjdk.java.net/guide/pull/80/files
  - new: https://git.openjdk.java.net/guide/pull/80/files/d2df771a..ad7c5916

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=guide&pr=80&range=02
 - incr: https://webrevs.openjdk.java.net/?repo=guide&pr=80&range=01-02

  Stats: 2 lines in 1 file changed: 2 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/guide/pull/80.diff
  Fetch: git fetch https://git.openjdk.java.net/guide pull/80/head:pull/80

PR: https://git.openjdk.java.net/guide/pull/80