Increase uptime threshold for USB canary

src/freedombone-usb-canary

 PROJECT_NAME=freedombone
 
 UPTIME=$(awk -F '.' '{print $1}' < "/proc/uptime")
-if [ "$UPTIME" -gt 120 ]; then
+if [ "$UPTIME" -gt 240 ]; then
     ADMIN_USER=$(grep 'Admin user' /root/${PROJECT_NAME}-completed.txt | awk -F ':' '{print $2}')
     MY_EMAIL_ADDRESS=${ADMIN_USER}@$(cat /etc/hostname)
     echo "USB device connected on ${DEVPATH}" | mail -s "${PROJECT_NAME} USB canary" "${MY_EMAIL_ADDRESS}"