varnish: add flying circus as maintainer

Author: ctheune

pkgs/servers/varnish/default.nix

@@ -83,7 +83,7 @@ let
         description = "Web application accelerator also known as a caching HTTP reverse proxy";
         homepage = "https://www.varnish-cache.org";
         license = licenses.bsd2;
-        maintainers = [ ];
+        maintainers = lib.teams.flyingcircus.members;
         platforms = platforms.unix;
       };
     };