Small typo of modprobe I2C command (#1205)

Author: jcarolinares

content/hardware/04.pro/boards/portenta-x8/tutorials/01.user-manual/content.md

@@ -1157,7 +1157,7 @@ Open Portenta X8 Shell as explained [here](#working-with-linux).
 Thus, execute the following command:
 
 ```arduino
-sudo madprobe i2c-dev
+sudo modprobe i2c-dev
 ```
 
 Insert the user password `fio`.