nixos/cgit: fix config example

The order of the keys matters: scan-path must be the last key for other settings
to be taken into account.

nixos/modules/services/web-servers/lighttpd/cgit.nix

@@ -42,10 +42,10 @@ in
     configText = mkOption {
       default = "";
       example = ''
-        cache-size=1000
-        scan-path=/srv/git
         source-filter=''${pkgs.cgit}/lib/cgit/filters/syntax-highlighting.py
         about-filter=''${pkgs.cgit}/lib/cgit/filters/about-formatting.sh
+        cache-size=1000
+        scan-path=/srv/git
       '';
       type = types.lines;
       description = ''