Fix log typo in task.go (#26337) (#26343)

Backport #26337 by @cassiozareck

Signed-off-by: cassiozareck <cassiomilczareck@gmail.com>

models/actions/task.go

@@ -281,7 +281,7 @@ func CreateTaskForRunner(ctx context.Context, runner *ActionRunner) (*ActionTask
 	if gots, err := jobparser.Parse(job.WorkflowPayload); err != nil {
 		return nil, false, fmt.Errorf("parse workflow of job %d: %w", job.ID, err)
 	} else if len(gots) != 1 {
-		return nil, false, fmt.Errorf("workflow of job %d: not signle workflow", job.ID)
+		return nil, false, fmt.Errorf("workflow of job %d: not single workflow", job.ID)
 	} else {
 		_, workflowJob = gots[0].Job()
 	}