Make the image URL include the platform.

Author: nedtwigg

selfie.dev/public/dalle-3-jvm.webp

@@ -119,6 +119,6 @@ cacheSelfieBinary { HttpClient().request(images[0].url).readBytes() }
 
 Since we used `toBeFile`, we can open `com/example/kotest/dalle-3.png` in Mac Preview / Windows Explorer.
 
-<img alt="Robot self portrait" src="/dalle-3.webp" width="400px"/>
+<img alt="Robot self portrait" src="/dalle-3-jvm.webp" width="400px"/>
 
 *Pull requests to improve the landing page and documentation are greatly appreciated, you can find the [source code here](https://github.com/diffplug/selfie).*