[gimp-web] content: a bit more update on books page.

[Jehan <jehanp src gnome org>]

commit 274e0ecd8ffecc4f1eea3dba86e278763b2d312f
Author: Jehan <jehan girinstud io>
Date:   Wed Sep 29 13:19:32 2021 +0200

    content: a bit more update on books page.

 content/books/index.md | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
---
diff --git a/content/books/index.md b/content/books/index.md
index a91c605d..9f252c68 100644
--- a/content/books/index.md
+++ b/content/books/index.md
@@ -10,6 +10,9 @@ file](https://gitlab.gnome.org/Infrastructure/gimp-web/-/blob/testing/content/bo
 *The file format is *markdown* (you may also look and copy the syntax
 used for listing other books). Keep the order by publication date.* ⚠️
 
+🛈 These books are not endorsed by the GIMP project. We simply list what
+exists when we are notified.
+
 ## Beginning Photo Retouching & Restoration Using GIMP
 
 ![Beginning Photo Retouching & Restoration Using GIMP](apress-photo-retouching-restoration-gimp-2014.jpg)
@@ -32,7 +35,7 @@ The exercise photos in the book are available to download for the reader to foll
  **Publisher/Date:** O'Reilly/2013  
  **Website:** [www.oreilly.de/catalog/gimpbuchger/](http://www.oreilly.de/catalog/gimpbuchger/)  
 
-**Description:** the book (in German) introduces readers to th basics of using GIMP, from importing to 
editing to printing.
+**Description:** the book (in German) introduces readers to the basics of using GIMP, from importing to 
editing to printing.
 
 ## Niveles y Curvas con GIMP