doc: fixed broken reference link for Graphviz

Fixes: https://tracker.ceph.com/issues/43130
Signed-off-by: James McClune <jmcclune@mcclunetechnologies.net>

diff --git a/doc/dev/documenting.rst b/doc/dev/documenting.rst
index 146dbc5199bf7ca8a8457ec34e83fe5b3845a890..01984c2561da148bd65dff3d04badc5255bd7342 100644 (file)
--- a/doc/dev/documenting.rst
+++ b/doc/dev/documenting.rst
@@ -63,7 +63,7 @@ Graphviz
 You can use Graphviz_, as explained in the `Graphviz extension documentation`_.
 
 .. _Graphviz: http://graphviz.org/
-.. _`Graphviz extension documentation`: http://sphinx.pocoo.org/ext/graphviz.html
+.. _`Graphviz extension documentation`: https://www.sphinx-doc.org/en/master/usage/extensions/graphviz.html
 
 .. graphviz::