[fix]:修复IMU图片错误

docs/chapt9/9.4为FishBot添加IMU传感器.md

@@ -16,7 +16,7 @@
 
 便宜的长这样：
 
-![image-20220409150754602](9.4%E4%B8%BAFishBot%E6%B7%BB%E5%8A%A0IMU%E4%BC%A0%E6%84%9F%E5%99%A8/imgs/image-20220409150448805.png
+![image-20220409150754602](9.4%E4%B8%BAFishBot%E6%B7%BB%E5%8A%A0IMU%E4%BC%A0%E6%84%9F%E5%99%A8/imgs/image-20220409150448805.png)
 
 
 贵的长这样：