Fix joypad 2 analog stick mapping

Previously, the player two "walk right" action was accidentally bound
to the right-hand stick, not the left-hand stick. Fix this.

Thanks to L. T. for playtesting and finding this bug.

project.godot

@@ -55,7 +55,7 @@ player_2_right={
 "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":68,"physical_keycode":0,"key_label":0,"unicode":100,"location":0,"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":68,"key_label":0,"unicode":0,"location":0,"echo":false,"script":null)
 , Object(InputEventJoypadButton,"resource_local_to_scene":false,"resource_name":"","device":1,"button_index":14,"pressure":0.0,"pressed":false,"script":null)
-, Object(InputEventJoypadMotion,"resource_local_to_scene":false,"resource_name":"","device":1,"axis":2,"axis_value":1.0,"script":null)
+, Object(InputEventJoypadMotion,"resource_local_to_scene":false,"resource_name":"","device":1,"axis":0,"axis_value":1.0,"script":null)
 ]
 }
 player_1_jump={