CI: windows: augment the timeout of building the windows container

CI: windows: augment the timeout of building the windows container

https://gitlab.freedesktop.org/mesa/mesa/-/jobs/6898838 failed at
uploading the containers but got kicked out right before being able to
give us a valid error.

Bump the timeout for windows container builds, to not have this
unfortunate situation.

Reviewed-by: Erik Faye-Lund <erik.faye-lund@collabora.com>
Reviewed-by: Daniel Stone <daniel@fooishbar.org>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8740>