📚 Update confirmation in Installation Script (home-assistant#12165)

* 📚 Update confirmation in Installation Script

If a user were to copy paste the commands, I believe it will fail as there is no confirmation on the initial `software-properties-common` install.

Add's `-y` flag so copy paste would work.  One other thought, could this maybe be optimised to a single line install?

* Update installation.markdown

source/hassio/installation.markdown

@@ -166,9 +166,8 @@ Debian/Ubuntu:
 
 ```bash
 sudo -i
-apt-get install software-properties-common
 apt-get update
-apt-get install -y apparmor-utils apt-transport-https avahi-daemon ca-certificates curl dbus jq network-manager socat
+apt-get install -y software-properties-common apparmor-utils apt-transport-https avahi-daemon ca-certificates curl dbus jq network-manager socat
 systemctl disable ModemManager
 curl -fsSL get.docker.com | sh
 ```