Take from spice-common this changeset:
Victor Toso (1):
sound: remove celt support
Remove and update reference from CI and documentation.
Signed-off-by: Frediano Ziglio <fziglio@redhat.com>
Acked-by: Victor Toso <victortoso@redhat.com>
-Remove BOM character if exists (this may interfere Static Site Generators)
-Use simple titles (SSG may use the title as the html file name)
-Fix title which violates the format