[gimp] Update POTFILES.in

[Piotr Drąg <piotrdrag src gnome org>]

commit 273178a5efbacad9c7439b023420c9598399dfef
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Sun Dec 26 12:08:03 2021 +0100

    Update POTFILES.in

 po/POTFILES.in | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/po/POTFILES.in b/po/POTFILES.in
index 25e3c93143..b66204f884 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -94,6 +94,7 @@ app/actions/windows-commands.c
 
 app/config/config-enums.c
 app/config/gimpconfig-file.c
+app/config/gimpcoreconfig.c
 app/config/gimpdialogconfig.c
 app/config/gimpdisplayoptions.c
 app/config/gimprc.c