Updated Working on Raspberry Pi (markdown)

Working-on-Raspberry-Pi.md

@@ -54,7 +54,7 @@ sudo apt-get install libdrm-dev libegl1-mesa-dev libgles2-mesa-dev libgbm-dev
 ```
 raylib also works on [DietPi](https://dietpi.com/) distribution, following libraries are required:
 ```
-sudo apt-get libraspberrypi-dev raspberrypi-kernel-headers
+sudo apt-get install libraspberrypi-dev raspberrypi-kernel-headers
 sudo apt-get install build-essential
 ```