Update boards_manager.md

Author: me-no-dev

Diff for: docs/arduino-ide/boards_manager.md

@@ -5,9 +5,9 @@ Starting with 1.6.4, Arduino allows installation of third-party platform package
 
 - Install the current upstream Arduino IDE at the 1.8 level or later. The current version is at the [Arduino website](http://www.arduino.cc/en/main/software).
 - Start Arduino and open Preferences window.
-- Enter ```https://dl.espressif.com/dl/package_esp32_index.json``` into *Additional Board Manager URLs* field. You can add multiple URLs, separating them with commas.
+- Enter `https://espressif.github.io/arduino-esp32/package_esp32_index.json` or `https://espressif.github.io/arduino-esp32/package_esp32_dev_index.json` into *Additional Board Manager URLs* field. You can add multiple URLs, separating them with commas.
 - Open Boards Manager from Tools > Board menu and install *esp32* platform (and don't forget to select your ESP32 board from Tools > Board menu after installation).
 
-Stable release link: `https://dl.espressif.com/dl/package_esp32_index.json`
+Stable release link: `https://espressif.github.io/arduino-esp32/package_esp32_index.json`
 
 Development release link: `https://espressif.github.io/arduino-esp32/package_esp32_dev_index.json`