root privileges required for apt

Need to use `sudo apt` if not root user. proceeding 2 lines already incorporate `sudo` commands so for consistency these lines should be `sudo` too.

README.md

@@ -22,8 +22,8 @@ _____
 ### With APT (recommended)
     echo "deb http://packages.azlux.fr/debian/ buster main" | sudo tee /etc/apt/sources.list.d/azlux.list
     wget -qO - https://azlux.fr/repo.gpg.key | sudo apt-key add -
-    apt update
-    apt install log2ram
+    sudo apt update
+    sudo apt install log2ram
 
 ### Manually
     curl -Lo log2ram.tar.gz https://github.com/azlux/log2ram/archive/master.tar.gz
@@ -133,7 +133,7 @@ systemctl status log2ram
 (Because sometime we need it)
 ### With APT
 ```
-apt remove log2ram
+sudo apt remove log2ram
 ```
 You can use `--purge` to remove config files as well.