[pygobject] Add Gaphor to Who is Using PyGObject

[Christoph Reiter <creiter src gnome org>]

commit 7de9b68719e7c846fee576138cf1f352b8d14efe
Author: Dan Yeaw <dan yeaw me>
Date:   Sun Dec 15 12:15:28 2019 -0500

    Add Gaphor to Who is Using PyGObject
    
    Signed-off-by: Dan Yeaw <dan yeaw me>

 docs/index.rst | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/docs/index.rst b/docs/index.rst
index 294662ef..7646390d 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -69,6 +69,7 @@ Who Is Using PyGObject?
 
 * `Anaconda <https://fedoraproject.org/wiki/Anaconda>`__ - an installation program used by Fedora, RHEL and 
others
 * `D-Feet <https://wiki.gnome.org/action/show/Apps/DFeet>`__ - an easy to use D-Bus debugger
+* `Gaphor <https://gaphor.org/>`__ - a simple modeling tool
 * `Girens <https://gitlab.gnome.org/tijder/girens>`__ - a Plex client for playing movies, TV shows and music 
from your Plex library
 * `GNOME Music <https://wiki.gnome.org/Apps/Music>`__ - a music player for GNOME
 * `GNOME Tweak Tool <https://wiki.gnome.org/action/show/Apps/GnomeTweakTool>`__ - a tool to customize 
advanced GNOME 3 options