tests: Update help section in openvino test

Test reports that it is a onednn test when it is openvino; update
description.

Fixes: #9948

Signed-off-by: Chelsea Mafrica <chelsea.e.mafrica@intel.com>

tests/metrics/machine_learning/openvino.sh

@@ -42,7 +42,7 @@ function help(){
 cat << EOF
 Usage: $0
    Description:
-       Runs onednn benchmark.
+       Runs openvino benchmark.
 EOF
 }