It's just a warning that the caller of `uart_driver_install()` did not specify the `ESP_INTR_FLAG_IRAM` flag, while the ISR is placed into IRAM by the sdkconfig option `CONFIG_UART_ISR_IN_IRAM=y`
This is a very old post, but the warning is being thrown from the esp_console.c module in IDF 5.2 because no flags are passed in to the uart_driver_install call in esp_console_new_repl_uart(). To fix this, the console module should pay attention to the CONFIG_UART_ISR_IN_IRAM flag, or let the caller configure through the esp_console_dev_uart_config_t struct.