Update Dockerfile to fix `np.bool` deprecation (#3998)

docker/Dockerfile

@@ -37,6 +37,8 @@ RUN yolo export model=tmp/yolov8n.pt format=edgetpu imgsz=32
 RUN yolo export model=tmp/yolov8n.pt format=ncnn imgsz=32
 # Requires <= Python 3.10, bug with paddlepaddle==2.5.0
 RUN pip install --no-cache paddlepaddle==2.4.2 x2paddle
+# Fix error: `np.bool` was a deprecated alias for the builtin `bool`
+RUN pip install --no-cache numpy==1.23.5
 # Remove exported models
 RUN rm -rf tmp