making changes to accomodate removing the pi user

scripts/update_birdnet.sh

@@ -2,14 +2,12 @@
 # Update BirdNET-Pi
 source /etc/birdnet/birdnet.conf
 trap 'exit 1' SIGINT SIGHUP
-USER=pi
-HOME=/home/pi
 my_dir=${HOME}/BirdNET-Pi/scripts
 
-sudo -u${USER} git -C /home/pi/BirdNET-Pi stash
-sudo -u${USER} git -C /home/pi/BirdNET-Pi pull -f
+sudo -u${USER} git -C $my_dir/BirdNET-Pi stash
+sudo -u${USER} git -C $my_dir/BirdNET-Pi pull -f
 sudo systemctl daemon-reload
-sudo -u${USER} git -C /home/pi/BirdNET-Pi stash pop
+sudo -u${USER} git -C $my_dir/BirdNET-Pi stash pop
 sudo ln -sf $my_dir/* /usr/local/bin/
 if ! grep PRIVACY_MODE /etc/birdnet/birdnet.conf;then
   sudo -u${USER} echo "PRIVACY_MODE=off" >> /etc/birdnet/birdnet.conf