fix install command

README.md

@@ -10,8 +10,9 @@ Installer Raspbian LITE :
 https://www.raspberrypi.org/documentation/installation/installing-images/README.md
 
 Executer le script d'installation :
+
 ```
-sudo apt-get -y install curl ; curl -sSL https://raw.githubusercontent.com/heuzef/Allo-GG/master/install.sh | sh
+sudo apt-get -y install curl ; sudo curl -sSL https://raw.githubusercontent.com/heuzef/Allo-GG/master/install.sh | sh
 ```
 ---