Update `scipy>=1.7.3` (#8595)

requirements.txt

@@ -8,7 +8,7 @@ opencv-python>=4.1.1
 Pillow>=7.1.2
 PyYAML>=5.3.1
 requests>=2.23.0
-scipy>=1.4.1  # Google Colab version
+scipy>=1.7.3  # Google Colab version
 torch>=1.7.0,!=1.12.0  # https://github.com/ultralytics/yolov5/issues/8395
 torchvision>=0.8.1,!=0.13.0  # https://github.com/ultralytics/yolov5/issues/8395
 tqdm>=4.41.0