Add workflow_dispatch to the triggers for artifact poisoning

Author: Alvaro Muñoz

ql/src/Security/CWE-829/ArtifactPoisoning.ql

@@ -16,7 +16,7 @@ import codeql.actions.security.ArtifactPoisoningQuery
 
 from LocalJob job, ArtifactDownloadStep download, Step run
 where
-  job.getWorkflow().getATriggerEvent() = "workflow_run" and
+  job.getWorkflow().getATriggerEvent() = ["workflow_run", "workflow_dispatch"] and
   (run instanceof Run or run instanceof UsesStep) and
   exists(int i, int j |
     job.getStep(i) = download and