test: update video asset URLs in test fixture

Author: ArnaudLigny

tests/fixtures/website/layouts/assets.html.twig

@@ -322,13 +322,13 @@
 
   <h3>HTML video</h3>
   <p>
-    <pre>html(asset('https://cecil.app/videos/cecil-demo.mp4'))</pre>
-    <blockquote>{{ html(asset('https://cecil.app/videos/cecil-demo.mp4')) }}</blockquote>
-    <pre>{{ html(asset('https://cecil.app/videos/cecil-demo.mp4'))|e }}</pre>
+    <pre>html(asset('video/test.mp4'))</pre>
+    <blockquote>{{ html(asset('video/test.mp4')) }}</blockquote>
+    <pre>{{ html(asset('video/test.mp4'))|e }}</pre>
     With `video` function:
-    <pre>video(asset('https://cecil.app/videos/cecil-demo.mp4'))</pre>
-    <blockquote>{{ video(asset('https://cecil.app/videos/cecil-demo.mp4')) }}</blockquote>
-    <pre>{{ video(asset('https://cecil.app/videos/cecil-demo.mp4'))|e }}</pre>
+    <pre>video(asset('video/test.mp4'))</pre>
+    <blockquote>{{ video(asset('video/test.mp4')) }}</blockquote>
+    <pre>{{ video(asset('video/test.mp4'))|e }}</pre>
   </p>
 
   <h3>Array of assets</h3>