v1.0.0 for ESP8266 multi synchronized PWM-channels

### Releases v1.0.0

1. Initial coding for ESP8266 boards using [ESP8266 core v3.0.2+](https://github.com/esp8266/Arduino/releases/tag/3.0.2)

Author: khoih-prog

README.md

@@ -135,7 +135,7 @@ Another way to install is to:
 
 1. Install [VS Code](https://code.visualstudio.com/)
 2. Install [PlatformIO](https://platformio.org/platformio-ide)
-3. Install [**ESP8266_PWM** library](https://platformio.org/lib/show/xxxxx/ESP8266_PWM) by using [Library Manager](https://platformio.org/lib/show/xxxxx/ESP8266_PWM/installation). Search for **ESP8266_PWM** in [Platform.io Author's Libraries](https://platformio.org/lib/search?query=author:%22Khoi%20Hoang%22)
+3. Install [**ESP8266_PWM** library](https://platformio.org/lib/show/12847/ESP8266_PWM) by using [Library Manager](https://platformio.org/lib/show/12847/ESP8266_PWM/installation). Search for **ESP8266_PWM** in [Platform.io Author's Libraries](https://platformio.org/lib/search?query=author:%22Khoi%20Hoang%22)
 4. Use included [platformio.ini](platformio/platformio.ini) file from examples to ensure that all dependent libraries will installed automatically. Please visit documentation for the other options and examples at [Project Configuration File](https://docs.platformio.org/page/projectconf.html)