assert torch!=1.12.0 for DDP training (#8621)

* assert torch!=1.12.0 for DDP training

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

requirements.txt

@@ -9,8 +9,8 @@ Pillow>=7.1.2
 PyYAML>=5.3.1
 requests>=2.23.0
 scipy>=1.4.1
-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
+torch>=1.7.0
+torchvision>=0.8.1
 tqdm>=4.64.0
 protobuf<4.21.3  # https://github.com/ultralytics/yolov5/issues/8012