autoinstall.sh error - wrong driverpath for arch arm64 on Linux_5.15.32

[rongith]

For Linux_5.15.32, in section case $strArch in:

	*aarch64*)
		arch=arm64
		echo "System is 64 bit arch."
		driverpath=./$version/$arch/pi3_4
	;;
	*)

Should be

	*aarch64*)
		arch=arm64
		echo "System is 64 bit arch."
		driverpath=./$version/$arch/$model
	;;
	*)

To refer properly to the repository structure.