[jnigen] Bump actions/setup-java (https://github.com/dart-lang/jnigen/issues/179)

Bumps [actions/setup-java](https://github.com/actions/setup-java) from 308abcba03229002f0055e17d79d00c32fca160f to 9b86bbe88a8152e5b9e6c15fd2e0efdd2994ffb6.
- [Release notes](https://github.com/actions/setup-java/releases)
- [Commits](https://github.com/actions/setup-java/compare/308abcba03229002f0055e17d79d00c32fca160f...9b86bbe88a8152e5b9e6c15fd2e0efdd2994ffb6)

---
updated-dependencies:
- dependency-name: actions/setup-java
  dependency-type: direct:production
...

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