package/libgtk4: fix typo in help text

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/libgtk4/Config.in

@@ -96,7 +96,7 @@ config BR2_PACKAGE_LIBGTK4_DEMO
 	select BR2_PACKAGE_SHARED_MIME_INFO
 	select BR2_PACKAGE_HICOLOR_ICON_THEME
 	help
-	  The GTK source base contains demo/exmaple programs.
+	  The GTK source base contains demo/example programs.
 	  This option allows to install them to the target.
 
 endif