[librsvg: 2/7] devel-docs: mention the location of the document's source code

[Marge Bot <marge-bot src gnome org>]

commit 7478809644a206159b3ba50255007eafaee74409
Author: Federico Mena Quintero <federico gnome org>
Date:   Thu Aug 18 10:47:39 2022 -0500

    devel-docs: mention the location of the document's source code
    
    Part-of: <https://gitlab.gnome.org/GNOME/librsvg/-/merge_requests/730>

 devel-docs/index.rst | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/devel-docs/index.rst b/devel-docs/index.rst
index 4087f78d9..35b4f36f2 100644
--- a/devel-docs/index.rst
+++ b/devel-docs/index.rst
@@ -13,6 +13,9 @@ Welcome to the developer's guide for librsvg.  This is for people who
 want to work on the development of librsvg itself, not for users of
 the library or the `rsvg-convert` program.
 
+If you want to modify this document, `please see its source code
+<https://gitlab.gnome.org/GNOME/librsvg/-/tree/main/devel-docs>`_.
+
 Introduction
 ------------