Merge branch 'docs/clarify_c2_esp8684_relation' into 'master'

docs: add clarification about the relationship between ESP32-C2 and ESP8684

See merge request espressif/esp-idf!41454

docs/en/index.rst

@@ -19,6 +19,13 @@ This is the documentation for Espressif IoT Development Framework (`esp-idf <htt
 
     This document describes using ESP-IDF with the {IDF_TARGET_NAME} SoC.
 
+.. only:: esp32c2
+
+    .. important::
+
+        The {IDF_TARGET_NAME} SoC series group currently includes only one series, the ESP8684. Therefore, any reference to {IDF_TARGET_NAME} in this document applies to the ESP8684.
+
+
 ==================  ==================  ==================
 |Get Started|_      |API Reference|_    |API Guides|_
 ------------------  ------------------  ------------------

docs/zh_CN/index.rst

@@ -19,6 +19,13 @@ ESP-IDF 编程指南
 
     本文档仅包含针对 {IDF_TARGET_NAME} 芯片的 ESP-IDF 使用。
 
+.. only:: esp32c2
+
+    .. important::
+
+        {IDF_TARGET_NAME} 芯片系列合集当前仅包含 ESP8684 一个系列，因此本文中出现的 {IDF_TARGET_NAME} 指的就是 ESP8684 芯片系列。
+
+
 ==================  ==================  ==================
 |快速入门|_          |API 参考|_         |API 指南|_
 ------------------  ------------------  ------------------