[gnome-builder] project-tree: Fix typo in i-wanna-be-list(-)box class name

[Christian Hergert <chergert src gnome org>]

commit 34d51b2ac52f188be7d13bc24238b9b41a2514e7
Author: vanadiae <vanadiae35 gmail com>
Date:   Wed Jun 30 16:18:13 2021 +0200

    project-tree: Fix typo in i-wanna-be-list(-)box class name

 src/plugins/project-tree/gbp-project-tree-pane.ui | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/plugins/project-tree/gbp-project-tree-pane.ui 
b/src/plugins/project-tree/gbp-project-tree-pane.ui
index c99ca7bbd..b78479e86 100644
--- a/src/plugins/project-tree/gbp-project-tree-pane.ui
+++ b/src/plugins/project-tree/gbp-project-tree-pane.ui
@@ -9,7 +9,7 @@
             <property name="level-indentation">16</property>
             <property name="visible">true</property>
             <style>
-              <class name="i-wanna-be-list-box"/>
+              <class name="i-wanna-be-listbox"/>
               <class name="project-tree"/>
             </style>
           </object>