fix: update image URL in post "Hilltop Coffee"

Author: tw93

src/pages/en/posts/239-Hilltop-Coffee.md

@@ -22,7 +22,7 @@ This open-source product has been maintained for about 5 years, incorporating ma
 5. Project fully upgraded to Swift 6, optimizing many code implementations and adapting to new features.
 6. Asynchronous image uploading is smoother, preview performance is optimized, and the experience is more consistent under editing status.
 
-<img src="https://cdn.tw93.fun/miaoyan/newmiaoyan.gif" width="800" />
+<img src="https://cdn.fliggy.com/pic/newmiaoyan15.gif" width="800" />
 
 **Try Tencent's Edge Security and Acceleration Platform: EdgeOne**  
 <https://pages.edgeone.ai/zh>  

src/pages/posts/239-山顶咖啡.md

@@ -22,7 +22,7 @@ date: 2025/09/22
 5. 项目全面升级到 Swift 6，优化不少代码实现，适配些新特性
 6. 异步图片上传更丝滑，预览性能优化，编辑状态下体验更一致
 
-<img src="https://cdn.tw93.fun/miaoyan/newmiaoyan.gif" width="800" />
+<img src="https://cdn.fliggy.com/pic/newmiaoyan15.gif" width="800" />
 
 **试试腾讯的边缘安全加速平台 EdgeOne**  
 <https://pages.edgeone.ai/zh>