Update video embed to GIF in overview documentation (#283)

Signed-off-by: Mathieu Benoit <mathieu-benoit@hotmail.fr>

Author: mathieu-benoit

content/en/docs/overview/_index.md

@@ -100,7 +100,7 @@ You can now use this Score file for deploying your workload to a specific platfo
 
 Check out the recording below where we walk through examples using [`score-compose`]({{< relref "/docs/score-implementation/score-compose" >}}) and [`score-k8s`]({{< relref "/docs/score-implementation/score-k8s" >}}) to generate manifests for Docker Compose and Kubernetes, both derived from the same Score spec.
 
-<script src="https://fast.wistia.com/embed/medias/m3mxb2w8vp.jsonp" async></script><script src="https://fast.wistia.com/assets/external/E-v1.js" async></script><div class="wistia_responsive_padding" style="padding:47% 0 0 0;position:relative;"><div class="wistia_responsive_wrapper" style="height:80%;left:0;position:absolute;top:0;width:80%;"><div class="wistia_embed wistia_async_m3mxb2w8vp seo=true videoFoam=true" style="height:80%;position:relative;width:80%"><div class="wistia_swatch" style="height:80%;left:0;opacity:0;overflow:hidden;position:absolute;top:0;transition:opacity 200ms;width:80%;"><img src="https://fast.wistia.com/embed/medias/m3mxb2w8vp/swatch" style="filter:blur(5px);height:80%;object-fit:contain;width:80%;" alt="" aria-hidden="true" onload="this.parentNode.style.opacity=1;" /></div></div></div></div>
+![](https://raw.githubusercontent.com/score-spec/sample-app-gif/refs/heads/main/score-demo.gif)
 
 ## Next steps