fixing documentation

docs/source/generating_workflow_benchmarks.rst

@@ -65,7 +65,7 @@ The generated benchmark will have exactly the same structure as the synthetic wo
     # create a workflow benchmark object to generate specifications based on a recipe
     benchmark = WorkflowBenchmark(recipe=BlastRecipe, num_tasks=500)
     # generate a specification based on performance characteristics and the structure of the synthetic workflow instance
-    path = benchmark.create_benchmark_from_synthetic_workflow(pathlib.Path("/tmp/"), workflow, cpu_work=100, data=10, percent_cpu=0.6)
+    path = benchmark.create_benchmark_from_synthetic_workflow(pathlib.Path("/tmp/"), workflow, cpu_work=100, percent_cpu=0.6)
 
 This is useful when you want to generate a benchmark with a specific structure or when you want
 benchmarks with the more detailed structure provided by WfChef workflow generation.