nats-server: 2.5.0 -> 2.6.0

pkgs/servers/nats-server/default.nix

···
 
 buildGoPackage rec {
   pname   = "nats-server";
-  version = "2.5.0";
+  version = "2.6.0";
 
   goPackagePath = "github.com/nats-io/${pname}";
 
···
     rev    = "v${version}";
     owner  = "nats-io";
     repo   = pname;
-    sha256 = "sha256-q6TgRbIorOL9ZSLdjAbqbwY60XJ2cZhxUHMrzGGZG8I=";
+    sha256 = "sha256-DggzXYPyu0dQ40L98VzxgN9S/35vLJJow9UjDtMz9rY=";
   };
 
   meta = {