[Helper] Nextcloud: fix subdomain

data/assets/nextcloud/nextcloud.conf

@@ -25,7 +25,7 @@ server {
   add_header X-Download-Options noopen;
   add_header X-Permitted-Cross-Domain-Policies none;
 
-  server_name NC_SERVER_SUB;
+  server_name NC_SUBD;
 
   root /web/nextcloud/;
 
@@ -111,7 +111,7 @@ server {
   add_header X-Download-Options noopen;
   add_header X-Permitted-Cross-Domain-Policies none;
 
-  server_name NC_SERVER_SUB;
+  server_name NC_SUBD;
 
   root /web/nextcloud/;