backend/wayland: emit tablet tool axis events to the axis handler

backend/wayland/tablet_v2.c

@@ -732,7 +732,7 @@ static void handle_tablet_tool_frame(void *data,
 		}
 
 		if (evt.updated_axes) {
-			wlr_signal_emit_safe(&tablet->events.proximity, &evt);
+			wlr_signal_emit_safe(&tablet->events.axis, &evt);
 		}
 	}