Update app.py

app.py

@@ -9,7 +9,7 @@ TORCH_VERSION = ".".join(torch.__version__.split(".")[:2])
 CUDA_VERSION = torch.__version__.split("+")[-1]
 
 # -- install pre-build detectron2
-!pip install detectron2 -f https://dl.fbaipublicfiles.com/detectron2/wheels/{CUDA_VERSION}/{TORCH_VERSION}/index.html
+!python -m pip install detectron2 -f https://dl.fbaipublicfiles.com/detectron2/wheels/{CUDA_VERSION}/{TORCH_VERSION}/index.html
 
 import detectron2
 from detectron2.utils.logger import setup_logger # ????