Add workflow_dispatch trigger to multi-platform build to allow testing without release by yawkat · Pull Request #13 · yawkat/lz4-java
But that is only if you (as maintainer) push changes and create a PR. For external contributors push will not trigger1.
Footnotes
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At least not in the context of the PR. The user might have enabled actions for their fork, but that would be explicit opt-in and the outcome of that actions run has no influence and is not visible in the context of the PR. ↩