[gnome-photos] Update HELP_LINGUAS

[Piotr Drąg <piotrdrag src gnome org>]

commit 752700c2630cdf12d9d34cccc7bacda7ff12d176
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Sun Mar 10 19:33:09 2019 +0100

    Update HELP_LINGUAS

 help/Makefile.am | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/help/Makefile.am b/help/Makefile.am
index 61c271f2..4fe5abe9 100644
--- a/help/Makefile.am
+++ b/help/Makefile.am
@@ -15,6 +15,6 @@ HELP_FILES = \
 HELP_MEDIA = \
        media/logo1.png
 
-HELP_LINGUAS = ca cs da de el es fr fur gl hu ko pl pt_BR ro sv
+HELP_LINGUAS = ca cs da de el es fr fur gl hu ko nl pl pt_BR ro sv
 
 -include $(top_srcdir)/git.mk