[libvirt PATCH v2] docs: use "::" instead of ".. code-block::"

[Erik Skultety]

On Mon, Oct 05, 2020 at 11:47:26AM +0100, Daniel P. Berrangé wrote:
> The former is a short hand for the latter and is already widely used in
> the docs. Using the short hand avoids incompatibility with the alternate
> impl of rst2html5.
> 
> Signed-off-by: Daniel P. Berrangé <berrange at redhat.com>
> ---

Reviewed-by: Erik Skultety <eskultet at redhat.com>