set max width on video element for v6.1.0 release page

Author: rthaut

docs/pages/releases/v6.1.0.md

@@ -22,7 +22,7 @@ nav_order: 2
 
 Here is a video showing the new filter creation processes, accessed via a right-click menu on any deviation thumbnail/link.
 
-<video autoplay controls loop muted>
+<video style="max-width: 100%;" autoplay controls loop muted>
   <source src="https://raw.githubusercontent.com/rthaut/deviantART-Filter/master/videos/create-filter-modal-process.mp4" type="video/mp4" />
   <source src="https://raw.githubusercontent.com/rthaut/deviantART-Filter/master/videos/create-filter-modal-process.webm" type="video/webm" />
 </video>