Fix redundant nginx directive

And typo. Should be 128k, not 1k!

modules/services/nginx.nix

@@ -25,9 +25,9 @@ in {
       # Reduce the permitted size of client requests, to reduce the likelihood
       # of buffer overflow attacks. This can be tweaked on a per-vhost basis, as
       # needed.
+      clientMaxBodySize = "128k";  # default 10m
       commonHttpConfig = ''
         client_body_buffer_size  4k;       # default: 8k
-        client_max_body_size 1k;           # default: 1m
         large_client_header_buffers 2 4k;  # default: 4 8k
       '';
     };