[gtk/ebassi/gidocgen] typo fix

[Matthias Clasen <matthiasc src gnome org>]

commit a909702a33441d0cbc7dad4d6b3bd12b2135077d
Author: Matthias Clasen <mclasen redhat com>
Date:   Fri Feb 19 16:02:31 2021 -0500

    typo fix

 docs/reference/gtk/visual_index.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/docs/reference/gtk/visual_index.md b/docs/reference/gtk/visual_index.md
index 9eadc18e33..2e5b91b172 100644
--- a/docs/reference/gtk/visual_index.md
+++ b/docs/reference/gtk/visual_index.md
@@ -8,7 +8,7 @@ Title: Widget Gallery
 [![levelbar](levelbar.png)](class.LevelBar.html)
 [![progressbar](progressbar.png)](class.ProgressBar.html)
 [![infobar](info-bar.png)](class.InfoBar.html)
-[![scrollbar](scrollbar.png)](class.ScrollBar.html)
+[![scrollbar](scrollbar.png)](class.Scrollbar.html)
 [![image](image.png)](class.Image.html)
 [![picture](picture.png)](class.Picture.html)
 [![separator](separator.png)](class.Separator.html)