docs: Add a note about TWAI multiple instances install

docs/en/api-reference/peripherals/twai.rst

@@ -404,6 +404,8 @@ The usage of macro initializers is not mandatory and each of the configuration s
 Install Multiple TWAI Instances
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
+**Note:** You can create {IDF_TARGET_CONFIG_SOC_TWAI_CONTROLLER_NUM} functional TWAI instance(s) because the {IDF_TARGET_NAME} has {IDF_TARGET_CONFIG_SOC_TWAI_CONTROLLER_NUM} physical TWAI controller(s).
+
 The following code snippet demonstrates how to install multiple TWAI instances via the use of the :cpp:func:`twai_driver_install_v2` function.
 
 .. code-block:: c

docs/zh_CN/api-reference/peripherals/twai.rst

@@ -404,6 +404,8 @@ TWAI 驱动程序通过 :cpp:type:`twai_message_t` 结构体的不同位字段
 安装多个 TWAI 实例
 ^^^^^^^^^^^^^^^^^^
 
+**注意：** {IDF_TARGET_NAME} 包含 {IDF_TARGET_CONFIG_SOC_TWAI_CONTROLLER_NUM} 个 TWAI 控制器，因此可创建 {IDF_TARGET_CONFIG_SOC_TWAI_CONTROLLER_NUM} 个 TWAI 实例。
+
 以下代码片段演示了如何使用 :cpp:func:`twai_driver_install_v2` 函数来安装多个 TWAI 实例。
 
 .. code-block:: c