https://github.com/jankratochvil/jdk21u-dev/actions/runs/16026488095/job/45215623689
[build.sh][INFO] Downloading https://archive.apache.org/dist/ant/binaries/apache-ant-1.10.8-bin.zip to /home/runner/work/jdk21u-dev/jdk21u-dev/jtreg/src/make/../build/deps/apache-ant-1.10.8-bin.zip
Error: sh][ERROR] wget exited with exit code 4
Error: Process completed with exit code 1.

It is enough to make an empty commit "retry CI" and push it to re-run the Github CI.
It happened for me twice:
https://github.com/openjdk/jdk21u-dev/pull/1663#event-18416642257
-> (I did not save the log, unaware how to access it now)
https://github.com/openjdk/jdk21u-dev/pull/1664#commits-pushed-c00e2ab
-> https://github.com/jankratochvil/jdk21u-dev/actions/runs/16026488095/job/45215623689