ci: Move deploy stage between container & build stages

Having it as the last stage meant that the pages job could only run
once all other jobs had finished.

The new position means it can run in parallel with build jobs.

Reviewed-by: Erik Faye-Lund <erik.faye-lund@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5711>
1 file changed