[PATCH] docs: Fix link to deployment guide

[Daniel Axtens]

Applied, thanks Ali.

> The old format redirects to a nonexistent page when
> there are multiple versions of the docs.
>
> Signed-off-by: Ali Alnubani <alialnu at mellanox.com>
> ---
>  docs/development/installation.rst | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/docs/development/installation.rst b/docs/development/installation.rst
> index 7f17881..940f730 100644
> --- a/docs/development/installation.rst
> +++ b/docs/development/installation.rst
> @@ -3,8 +3,8 @@ Installation
>  
>  This document describes the necessary steps to configure Patchwork in a
>  development environment. If you are interested in deploying Patchwork in a
> -production environment, refer to `the deployment guide
> -</deployment/installation>`__ instead.
> +production environment, refer to :doc:`the deployment guide
> +</deployment/installation>` instead.
>  
>  To begin, you should clone Patchwork:
>  
> -- 
> 2.11.0
>
> _______________________________________________
> Patchwork mailing list
> Patchwork at lists.ozlabs.org
> https://lists.ozlabs.org/listinfo/patchwork