[gimp/wip/akkana/Light-theme] Change README to not say the System theme is the only one so far

[Akkana Peck <akkana src gnome org>]

commit b97044383e2195e27468b7509c3010deba421fd9
Author: Akkana Peck <akkana shallowsky com>
Date:   Tue Aug 9 11:58:38 2022 -0600

    Change README to not say the System theme is the only one so far

 devel-docs/README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/devel-docs/README.md b/devel-docs/README.md
index 9b6b297bd2..201c9faa65 100644
--- a/devel-docs/README.md
+++ b/devel-docs/README.md
@@ -236,7 +236,7 @@ it's far from being perfect unfortunately.
 Another good idea would be to look at existing well maintained GTK3
 themes to get inspiration and see how things work.
 
-Finally you can look at our only current theme, the [System
+Finally you can look at our existing themes, like the [System
 theme](https://gitlab.gnome.org/GNOME/gimp/-/blob/master/themes/System/gimp.css).
 Note though that this `System` theme is pretty bare, and that's its goal
 (try to theme as few as possible over whatever is the current real