[PATCH offline-mirror 1/2] docs: offline-media: fix refence to example

[Maximiliano Sandoval <m.sandoval@proxmox.com>]

At the moment the "Example: Local HTTP Server" section generates a link
to `#example-local-http-server`. We set the existing reference
explicitly instead of relying on the section title.

Signed-off-by: Maximiliano Sandoval <m.sandoval@proxmox.com>
---

Notes:
    Without this patch the rendered docs will point to a non existent
    section (commits) `#id1` and the link will be rendered literally as
    "`Local HTTP Server`_" (displaying the ` and _ characters literally).

 docs/offline-media.rst | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/docs/offline-media.rst b/docs/offline-media.rst
index 7f02ad5..b8de52a 100644
--- a/docs/offline-media.rst
+++ b/docs/offline-media.rst
@@ -83,6 +83,8 @@ one or more of either the one of a Debian or Proxmox project, for example ``pve-
 Now you should be able to upgrade like normally, and don't forget to disable the repository entry
 again until next time, once your done.
 
+.. _example-local-http-server:
+
 Example: Local HTTP Server
 ^^^^^^^^^^^^^^^^^^^^^^^^^^
 
@@ -110,7 +112,7 @@ offline-key`` directly or follow the respective step when doing the guided setup
 ``proxmox-offline-mirror-helper setup`` command.
 
 The ``offline-key`` command supports both local mountpoints and HTTP URLs. When using an HTTP
-server (as described in the `Local HTTP Server`_ section), you can activate subscription keys
+server (as described in the :ref:`example-local-http-server` section), you can activate subscription keys
 directly from the HTTP URL without needing to mount the medium locally:
 
 .. code-block:: console
-- 
2.47.3