Undefined function `tailscale_update` in `manage.sh`

There is an error (/mnt/data/tailscale/manage.sh: line 151: tailscale_update: not found) in the code of manage.sh.

Line 151 in 8d3758c

tailscale_has_update && tailscale_update || echo "Not updated"

tailscale_update is an undefined function in the script. Workaround would be to structure the script like this:

tailscale_update() {
  tailscale_stop
  tailscale_install "$1"
  tailscale_start
}

case $1 in
  "update!")
    if tailscale_has_update "$2"; then
      tailscale_update "$2"
    else
      echo "Tailscale is already up to date"
    fi
    ;;
  "on-boot")
    # shellcheck source=package/tailscale-env
    . "${TAILSCALE_ROOT}/tailscale-env"

    if [ "${TAILSCALE_AUTOUPDATE}" = "true" ]; then
      tailscale_has_update && tailscale_update || echo "Not updated"
    fi

    tailscale_start
    ;;

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