Fix upward movement key to be W in Multiplayer Bomber (#1049)

It was accidentally set to Z instead.

networking/multiplayer_bomber/project.godot

@@ -56,7 +56,7 @@ move_right={
 }
 move_up={
 "deadzone": 0.2,
-"events": [Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":-1,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":90,"key_label":0,"unicode":119,"echo":false,"script":null)
+"events": [Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":-1,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":87,"key_label":0,"unicode":119,"echo":false,"script":null)
 , Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":-1,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":4194320,"key_label":0,"unicode":0,"echo":false,"script":null)
 , Object(InputEventJoypadMotion,"resource_local_to_scene":false,"resource_name":"","device":-1,"axis":1,"axis_value":-1.0,"script":null)
 , Object(InputEventJoypadButton,"resource_local_to_scene":false,"resource_name":"","device":-1,"button_index":11,"pressure":0.0,"pressed":false,"script":null)