[nominatim-web] Match also C in accept-language

[Bartłomiej Piotrowski <bpiotrowski src gnome org>]

commit a09b043ceaf8df42f8a968b12b391fa08164c972
Author: Bartłomiej Piotrowski <bpiotrowski gnome org>
Date:   Thu May 21 20:06:24 2020 +0200

    Match also C in accept-language

 nginx.conf | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/nginx.conf b/nginx.conf
index e247262..c7fdc72 100644
--- a/nginx.conf
+++ b/nginx.conf
@@ -25,7 +25,7 @@ server {
        access_log off;
     }
 
-    if ($args ~* "accept-language\=([a-zA-z-]{5})") {
+    if ($args ~* "accept-language\=([a-zA-z-]{1,5})") {
         set $lang $1;
     }