[evolution] help: Add missing file to CMakeLists.txt

[Andre Klapper <aklapper src gnome org>]

commit 89d3b11300530deb7a764b8fce8e9ac7fc25ebfe
Author: Andre Klapper <a9016009 gmx de>
Date:   Mon May 11 20:12:53 2020 +0200

    help: Add missing file to CMakeLists.txt
    
    https://mail.gnome.org/archives/evolution-list/2020-May/msg00085.html

 help/CMakeLists.txt | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/help/CMakeLists.txt b/help/CMakeLists.txt
index 00c1023e1d..990743e5c8 100644
--- a/help/CMakeLists.txt
+++ b/help/CMakeLists.txt
@@ -199,6 +199,7 @@ set(HELP_FILES
        mail-send-and-receive.page
        mail-sending-options-smtp.page
        mail-several-pop-accounts.page
+       mail-sorting-folder-list.page
        mail-sorting-message-list.page
        mail-spam-marking.page
        mail-spam.page