Update evcc.sh

change upgrade command

ct/evcc.sh

@@ -56,7 +56,7 @@ header_info
 if [[ ! -f /etc/apt/sources.list.d/evcc-stable.list ]]; then msg_error "No ${APP} Installation Found!"; exit; fi
 msg_info "Updating evcc LXC"
 apt update &>/dev/null
-apt install -y evcc &>/dev/null
+apt --only-upgrade install -y evcc &>/dev/null
 msg_ok "Updated Successfully"
 exit
 }