[gspell] docs: dev-notes: add a link

[Sébastien Wilmet <swilmet src gnome org>]

commit b2ec43af3a12b7b035063f27e7af296bedff4a79
Author: Sébastien Wilmet <sw swilmet be>
Date:   Thu May 13 12:49:51 2021 +0200

    docs: dev-notes: add a link

 docs/dev-notes.md | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/docs/dev-notes.md b/docs/dev-notes.md
index 7c79d73..201fd05 100644
--- a/docs/dev-notes.md
+++ b/docs/dev-notes.md
@@ -11,4 +11,6 @@ Using hunspell directly instead of Enchant?
 Other links
 -----------
 
+- GNOME: [Platform-wide Spell Checking](https://wiki.gnome.org/Initiatives/SpellChecking),
+  predates the creation of gspell.
 - https://zverok.github.io/blog/2021-05-06-how-to-spellcheck.html