doc: user guide: fix result --> output
doc: user guide: fix result --> output

Fix an old reference to "result processors", correcting it to "output
processors".

setrofim/workload-automation,lisatn/workload-automation,lisatn/workload-automation,setrofim/workload-automation,ARM-software/workload-automation,setrofim/workload-automation,ARM-software/workload-automation,setrofim/workload-automation,ARM-software/workload-automation,lisatn/workload-automation,ARM-software/workload-automation,lisatn/workload-automation