v1.1.0 to add ESP32-S2 support

### Release v1.1.0

1. Add support to **ESP32-S2 (ESP32-S2 Saola and AI-Thinker ESP-12K)**
2. Add [**Instructions to install ESP32-S2 core**](#howto-install-esp32-s2-core-for-esp32-s2-saola-ai-thinker-esp-12k-boards-into-arduino-ide)

Author: khoih-prog

README.md

@@ -22,7 +22,7 @@
   * [Use Arduino Library Manager](#use-arduino-library-manager)
   * [Manual Install](#manual-install)
   * [VS Code & PlatformIO](#vs-code--platformio)
-* [HOWTO Install esp32-s2 core for ESP32-S2 (Saola, AI-Thinker ESP-12K) boards into Arduino IDE)](##howto-install-esp32-s2-core-for-esp32-s2-saola-ai-thinker-esp-12k-boards-into-arduino-ide)
+* [HOWTO Install esp32-s2 core for ESP32-S2 (Saola, AI-Thinker ESP-12K) boards into Arduino IDE)](#howto-install-esp32-s2-core-for-esp32-s2-saola-ai-thinker-esp-12k-boards-into-arduino-ide)
   * [1. Save the original esp32 core](#1-save-the-original-esp32-core)
   * [2. Download esp32-s2 core](#2-download-esp32-s2-core)
     * [2.1 Download zip](#21-download-zip)