Update actions/setup-java action to v4 #756

All 824 tests pass, 9 skipped in 8s

  96 files ±0   96 suites ±0 8s ⏱️ +3s
833 tests ±0 824 ✔️ ±0   9 💤 ±0 0 ❌ ±0
850 runs ±0 836 ✔️ ±0 14 💤 ±0 0 ❌ ±0

Results for commit 9a88865. ± Comparison against earlier commit decddc6.