webkitgtk: upgrade 2.36.1 -> 2.36.3

webkitgtk: upgrade 2.36.1 -> 2.36.3

This is a bug fix release in the stable 2.36 series.

Support capturing already encoded video streams, which takes advantage of encoding done in hardware by devices which support this feature.
Avoid using experimental GStreamer elements for video demuxing.
Avoid using the legacy GStreamer VA-API decoding plug-ins, which often cause rendering issues and are not much maintained. Their usage can be re-enabled setting WEBKIT_GST_ENABLE_LEGACY_VAAPI=1 in the environment.
Fix playback of YouTube streams which use dynamic ad insertion.
Fix display capture with Pipewire.
Fix the build without the X11 target when X11 headers are not present.
Fix several crashes and rendering issues.

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit 69e1c72417a4ea5594c17ead7bff2f9a0298e6c5)
Signed-off-by: Steve Sakoman <steve@sakoman.com>