If your Grub Menu does not appear at boot, you can follow the steps here to pull up the grub menu.
In short, bap the esc or tab key like a wildman as soon as you begin to see the motherboard splash sceen.
From the grub menu, choose Advanced Options for Zorin
then select the option for Zorin on 5.15.0-83 or Zorin on 5.15.0-84
Do not select the one with `(Recovery) after it. That will take you to the recovery menu instead of booting the computer.
Once you reach the desktop, check your kernel to make sure you are no longer on the 5.15.0-87
uname -r
Then test your SDCard...