docs: add robodog.pick demo gif (needs a better one)

website/src/docs/robodog.md

@@ -62,7 +62,7 @@ resultPromise.then((bundle) => {
 })
 ```
 
-**ADD IMAGE OR GIF HERE**
+<img src="/images/temp-robodog-demo.gif" alt="Robodog File Picker Demo GIF">
 
 <a class="MoreButton" href="/docs/robodog/picker">View Documentation</a>