LibWeb: Prefix AK::Duration with AK Namespace

Author: https://github.com/ADKaster
Commit: b20a1d0fcd
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/676
Reviewed-by: https://github.com/AtkinsSJ ✅
Reviewed-by: https://github.com/trflynn89 ✅

Userland/Libraries/LibWeb/HTML/HTMLVideoElement.cpp

@@ -132,7 +132,7 @@ void HTMLVideoElement::on_paused()
 void HTMLVideoElement::on_seek(double position, MediaSeekMode seek_mode)
 {
     if (m_video_track)
-        m_video_track->seek(Duration::from_milliseconds(position * 1000.0), seek_mode);
+        m_video_track->seek(AK::Duration::from_milliseconds(position * 1000.0), seek_mode);
 }
 
 // https://html.spec.whatwg.org/multipage/media.html#attr-video-poster