nginx: remove unactive maintainers and add raitobezarius as a maintainer

Removed maintainers which does not maintain NGINX anymore for the last year at least.
Added myself as I use it actively.

pkgs/servers/http/nginx/generic.nix

@@ -190,6 +190,6 @@ stdenv.mkDerivation {
     license     = [ licenses.bsd2 ]
       ++ concatMap (m: m.meta.license) modules;
     platforms   = platforms.all;
-    maintainers = with maintainers; [ thoughtpolice raskin fpletz globin ajs124 ];
+    maintainers = with maintainers; [ fpletz ajs124 raitobezarius ];
   };
 }