Fix Credo warning

test/gc_index_relay_web/controllers/filter_controller_test.exs

@@ -145,7 +145,7 @@ defmodule GcIndexRelayWeb.FilterControllerTest do
       conn = post(conn, ~p"/api/events/filter", %{"limit" => 10})
 
       assert %{"data" => events} = json_response(conn, 200)
-      assert length(events) >= 1
+      assert not Enum.empty?(events)
       assert length(events) <= 10
     end