revert change in tutorial

Author: YilingQiao

examples/tutorials/draw_debug.py

@@ -34,10 +34,7 @@ def main():
 
     # Debug line
     debug_line = scene.draw_debug_line(
-        start=np.array((0.5, -0.25, 0.5)),
-        end=np.array((0.5, 0.25, 0.5)),
-        radius=0.01,
-        color=(1, 0, 0, 1),
+        start=(0.5, -0.25, 0.5), end=(0.5, 0.25, 0.5), radius=0.01, color=(1, 0, 0, 1)
     )  # Red
 
     # Debug arrow