fix(github_artifacts): enforce sane default values

collections/ansible_collections/nullified/infrastructure/plugins/modules/github_artifact.py

@@ -338,6 +338,10 @@ def main():
     artifact: dict[str, str | list[str]] = {}
     for param_name in ["asset_name", "asset_type", "cmds", "repository", "version"]:
         artifact[param_name] = ANSIBLE_MODULE.params[param_name]
+    if not artifact["version"]:
+        artifact["version"] = "latest"
+    if not artifact["cmds"]:
+        artifact["cmds"] = []
 
     asset_data: dict[str, str] = fetch_metadata(artifact)
     result["rate_limit_remaining"] = asset_data.get("rate_limit_remaining", "unknown")