Update `np.random.random()` to `random.random()` (#3967)

utils/autoanchor.py

 # Auto-anchor utils
 
+import random
+
 import numpy as np
 import torch
 import yaml
@@ -149,7 +151,7 @@ def kmean_anchors(path='./data/coco128.yaml', n=9, img_size=640, thr=4.0, gen=10
     for _ in pbar:
         v = np.ones(sh)
         while (v == 1).all():  # mutate until a change occurs (prevent duplicates)
-            v = ((npr.random(sh) < mp) * npr.random() * npr.randn(*sh) * s + 1).clip(0.3, 3.0)
+            v = ((npr.random(sh) < mp) * random.random() * npr.randn(*sh) * s + 1).clip(0.3, 3.0)
         kg = (k.copy() * v).clip(min=2.0)
         fg = anchor_fitness(kg)
         if fg > f: