v1.4.0 to add support to Portenta_H7

### Major Releases v1.4.0

1. Add support to **Portenta_H7** using [**Arduino mbed_portenta core**](https://github.com/arduino/ArduinoCore-mbed).
2. Update `Packages' Patches` for **Portenta_H7**

Author: khoih-prog

README.md

@@ -430,7 +430,7 @@ With core after v1.5.0, this step is not necessary anymore thanks to the PR [Add
 
 #### 9. For Portenta_H7 boards using Arduino IDE in Linux
 
-  **To be able to upload firmware to Portenta_H7 using Arduino IDE in Linux (Ubuntu, etc.)**, you have to copy the file [portenta_post_install.sh](Packages_Patches/mbed_portenta/2.4.1) into mbed_portenta directory (~/.arduino15/packages/arduino/hardware/mbed_portenta/2.4.1). 
+  **To be able to upload firmware to Portenta_H7 using Arduino IDE in Linux (Ubuntu, etc.)**, you have to copy the file [portenta_post_install.sh](Packages_Patches/arduino/hardware/mbed_portenta/2.4.1/portenta_post_install.sh) into mbed_portenta directory (~/.arduino15/packages/arduino/hardware/mbed_portenta/2.4.1/portenta_post_install.sh). 
 
   Then run the following command using `sudo`