[bsp][stm32][stm32f103-atk-warshipv3] update README.md to correct the picture name (RT-Thread#10106)

hywing · web-flow · commit fbe6563922d9 · 2025-03-13T10:57:54.000+08:00
diff --git a/bsp/stm32/stm32f103-atk-warshipv3/README.md b/bsp/stm32/stm32f103-atk-warshipv3/README.md
@@ -18,7 +18,7 @@ STM32F103战舰V3，资源丰富，接口多，功能强大，性价比高，资
 
 开发板外观如下图所示：
 
-![board](figures/board.png)
+![board](figures/board.jpg)
 
 该开发板常用 **板载资源** 如下：
 
