Update to dav1d v1.3.0 including soname bump coming to rawhide

[Fabio Valentini]

Hi all,

I am planning to push the update for dav1d v1.3.0 to rawhide. It
involves an soname bump from libdav1d.so.6 to libdav1d.so.7 due to
minor ABI changes. According to the release notes, there are were no
actual breaking changes to existing APIs, so the update should be
safe:

https://code.videolan.org/videolan/dav1d/-/blob/1.3.0/NEWS

As far as I can tell, the following packages will need to be rebuilt:

- ffmpeg
- firefox
- libavif
- libheif
- seamonkey
- vlc
- xine-lib

The builds will be handled in a side-tag by me, other provenpackagers,
or multimedia-sig members.

Fabio