Update loadgen package name in classification_and_detection setup (#2131)

Co-authored-by: Miro <[email protected]>

Author: annietllnd

vision/classification_and_detection/setup.py

@@ -100,7 +100,7 @@ def run(self):
         "pybind11",
         "Cython",
         "pycocotools",
-        "mlperf_loadgen",
+        "mlcommons_loadgen",
         "opencv-python-headless",
     ],
 )