github/workflows/ci-aarch64: Update shim path for aarch64

Author: travier

.github/workflows/ci-aarch64.yml

@@ -47,7 +47,7 @@ jobs:
           sudo losetup -P -f myimage.raw
           device=$(losetup --list --noheadings --output NAME,BACK-FILE | grep myimage.raw | awk '{print $1}')
           sudo mount "${device}p2" /mnt/
-          sudo ls /mnt/EFI/centos/{grub.cfg,shimx64.efi}
+          sudo ls /mnt/EFI/centos/{grub.cfg,shimaa64.efi}
           sudo umount /mnt
           sudo losetup -D "${device}"
           sudo rm -f myimage.raw