[gnome-dictionary] Fix wrong target name for Help button in Sources dialog

[Andre Klapper <aklapper src gnome org>]

commit f49a93f9f02228c379d3eb7f12f6f107eb13c2db
Author: Andre Klapper <a9016009 gmx de>
Date:   Mon Aug 9 21:20:42 2021 +0200

    Fix wrong target name for Help button in Sources dialog

 src/gdict-source-dialog.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/src/gdict-source-dialog.c b/src/gdict-source-dialog.c
index df99999..3b92f2f 100644
--- a/src/gdict-source-dialog.c
+++ b/src/gdict-source-dialog.c
@@ -449,11 +449,11 @@ on_dialog_response (GtkDialog *dialog,
     case GTK_RESPONSE_HELP:
 #if GTK_CHECK_VERSION (3, 22, 0)
       gtk_show_uri_on_window (GTK_WINDOW (dialog),
-                              "help:gnome-dictionary/gnome-dictionary-add-source",
+                              "help:gnome-dictionary/sources",
                               gtk_get_current_event_time (), &err);
 #else
       gtk_show_uri (gtk_widget_get_screen (GTK_WIDGET (dialog)),
-                    "help:gnome-dictionary/gnome-dictionary-add-source",
+                    "help:gnome-dictionary/sources",
                     gtk_get_current_event_time (), &err);
 #endif