v1.0.0 for Portenta_H7 Slow PWM

### Initial Releases v1.0.0

1. Initial coding to support **Portenta_H7 boards** such as Portenta_H7 Rev2 ABX00042, etc., using [**ArduinoCore-mbed mbed_portenta** core](https://github.com/arduino/ArduinoCore-mbed)

README.md

@@ -144,7 +144,7 @@ Another way to install is to:
 
 1. Install [VS Code](https://code.visualstudio.com/)
 2. Install [PlatformIO](https://platformio.org/platformio-ide)
-3. Install [**Portenta_H7_Slow_PWM** library](https://platformio.org/lib/show/xxxxx/Portenta_H7_Slow_PWM) by using [Library Manager](https://platformio.org/lib/show/xxxxx/Portenta_H7_Slow_PWM/installation). Search for **Portenta_H7_Slow_PWM** in [Platform.io Author's Libraries](https://platformio.org/lib/search?query=author:%22Khoi%20Hoang%22)
+3. Install [**Portenta_H7_Slow_PWM** library](https://platformio.org/lib/show/12854/Portenta_H7_Slow_PWM) by using [Library Manager](https://platformio.org/lib/show/12854/Portenta_H7_Slow_PWM/installation). Search for **Portenta_H7_Slow_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)
 
 ---