remove editable mode as it is not supported on older pip version

examples/python-dataflow/dataflow.yml

@@ -1,6 +1,6 @@
 nodes:
   - id: camera
-    build: pip install -e ../../node-hub/opencv-video-capture
+    build: pip install ../../node-hub/opencv-video-capture
     path: opencv-video-capture
     inputs:
       tick: dora/timer/millis/20
@@ -12,7 +12,7 @@ nodes:
       IMAGE_HEIGHT: 480
 
   - id: object-detection
-    build: pip install -e ../../node-hub/ultralytics-yolo
+    build: pip install ../../node-hub/ultralytics-yolo
     path: ultralytics-yolo
     inputs:
       image:
@@ -24,7 +24,7 @@ nodes:
       MODEL: yolov8n.pt
 
   - id: plot
-    build: pip install -e ../../node-hub/opencv-plot
+    build: pip install ../../node-hub/opencv-plot
     path: opencv-plot
     inputs:
       image: